HDFS-13044. RBF: Add a safe mode for the Router. Contributed by Inigo Goiri.
This commit is contained in:
Yiqun Lin
parent
fde95d463c
commit
dbb9dded33
@ -1291,6 +1291,19 @@ public class DFSConfigKeys extends CommonConfigurationKeys {
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public static final long FEDERATION_STORE_ROUTER_EXPIRATION_MS_DEFAULT =
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TimeUnit.MINUTES.toMillis(5);
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// HDFS Router safe mode
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public static final String DFS_ROUTER_SAFEMODE_ENABLE =
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FEDERATION_ROUTER_PREFIX + "safemode.enable";
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public static final boolean DFS_ROUTER_SAFEMODE_ENABLE_DEFAULT = true;
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public static final String DFS_ROUTER_SAFEMODE_EXTENSION =
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FEDERATION_ROUTER_PREFIX + "safemode.extension";
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public static final long DFS_ROUTER_SAFEMODE_EXTENSION_DEFAULT =
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TimeUnit.SECONDS.toMillis(30);
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public static final String DFS_ROUTER_SAFEMODE_EXPIRATION =
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FEDERATION_ROUTER_PREFIX + "safemode.expiration";
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public static final long DFS_ROUTER_SAFEMODE_EXPIRATION_DEFAULT =
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3 * DFS_ROUTER_CACHE_TIME_TO_LIVE_MS_DEFAULT;
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// HDFS Router-based federation mount table entries
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/** Maximum number of cache entries to have. */
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public static final String FEDERATION_MOUNT_TABLE_MAX_CACHE_SIZE =
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@ -118,6 +118,8 @@ public class Router extends CompositeService {
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private RouterStore routerStateManager;
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/** Heartbeat our run status to the router state manager. */
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private RouterHeartbeatService routerHeartbeatService;
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/** Enter/exit safemode. */
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private RouterSafemodeService safemodeService;
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/** The start time of the namesystem. */
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private final long startTime = Time.now();
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@ -232,13 +234,25 @@ protected void serviceInit(Configuration configuration) throws Exception {
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addService(this.quotaUpdateService);
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}
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// Safemode service to refuse RPC calls when the router is out of sync
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if (conf.getBoolean(
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DFSConfigKeys.DFS_ROUTER_SAFEMODE_ENABLE,
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DFSConfigKeys.DFS_ROUTER_SAFEMODE_ENABLE_DEFAULT)) {
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// Create safemode monitoring service
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this.safemodeService = new RouterSafemodeService(this);
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addService(this.safemodeService);
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}
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super.serviceInit(conf);
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}
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@Override
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protected void serviceStart() throws Exception {
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updateRouterState(RouterServiceState.RUNNING);
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if (this.safemodeService == null) {
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// Router is running now
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updateRouterState(RouterServiceState.RUNNING);
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}
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if (this.pauseMonitor != null) {
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this.pauseMonitor.start();
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@ -179,6 +179,8 @@ public class RouterRpcServer extends AbstractService implements ClientProtocol {
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/** Interface to map global name space to HDFS subcluster name spaces. */
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private final FileSubclusterResolver subclusterResolver;
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/** If we are in safe mode, fail requests as if a standby NN. */
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private volatile boolean safeMode;
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/** Category of the operation that a thread is executing. */
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private final ThreadLocal<OperationCategory> opCategory = new ThreadLocal<>();
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@ -370,12 +372,12 @@ public InetSocketAddress getRpcAddress() {
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* @param op Category of the operation to check.
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* @param supported If the operation is supported or not. If not, it will
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* throw an UnsupportedOperationException.
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* @throws StandbyException If the Router is in safe mode and cannot serve
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* client requests.
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* @throws SafeModeException If the Router is in safe mode and cannot serve
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* client requests.
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* @throws UnsupportedOperationException If the operation is not supported.
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*/
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protected void checkOperation(OperationCategory op, boolean supported)
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throws StandbyException, UnsupportedOperationException {
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throws RouterSafeModeException, UnsupportedOperationException {
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checkOperation(op);
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if (!supported) {
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@ -393,10 +395,11 @@ protected void checkOperation(OperationCategory op, boolean supported)
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* UNCHECKED. This function should be called by all ClientProtocol functions.
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*
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* @param op Category of the operation to check.
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* @throws StandbyException If the Router is in safe mode and cannot serve
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* client requests.
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* @throws SafeModeException If the Router is in safe mode and cannot serve
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* client requests.
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*/
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protected void checkOperation(OperationCategory op) throws StandbyException {
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protected void checkOperation(OperationCategory op)
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throws RouterSafeModeException {
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// Log the function we are currently calling.
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if (rpcMonitor != null) {
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rpcMonitor.startOp();
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@ -415,7 +418,33 @@ protected void checkOperation(OperationCategory op) throws StandbyException {
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return;
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}
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// TODO check Router safe mode and return Standby exception
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if (safeMode) {
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// Throw standby exception, router is not available
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if (rpcMonitor != null) {
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rpcMonitor.routerFailureSafemode();
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}
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throw new RouterSafeModeException(router.getRouterId(), op);
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}
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}
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/**
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* In safe mode all RPC requests will fail and return a standby exception.
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* The client will try another Router, similar to the client retry logic for
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* HA.
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*
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* @param mode True if enabled, False if disabled.
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*/
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public void setSafeMode(boolean mode) {
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this.safeMode = mode;
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}
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/**
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* Check if the Router is in safe mode and cannot serve RPC calls.
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*
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* @return If the Router is in safe mode.
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*/
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public boolean isInSafeMode() {
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return this.safeMode;
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}
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@Override // ClientProtocol
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@ -0,0 +1,53 @@
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/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.hadoop.hdfs.server.federation.router;
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import org.apache.hadoop.hdfs.server.namenode.NameNode.OperationCategory;
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import org.apache.hadoop.ipc.StandbyException;
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/**
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* Exception that the Router throws when it is in safe mode. This extends
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* {@link StandbyException} for the client to try another Router when it gets
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* this exception.
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*/
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public class RouterSafeModeException extends StandbyException {
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private static final long serialVersionUID = 453568188334993493L;
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/** Identifier of the Router that generated this exception. */
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private final String routerId;
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/**
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* Build a new Router safe mode exception.
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* @param router Identifier of the Router.
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* @param op Category of the operation (READ/WRITE).
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*/
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public RouterSafeModeException(String router, OperationCategory op) {
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super("Router " + router + " is in safe mode and cannot handle " + op
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+ " requests.");
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this.routerId = router;
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}
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/**
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* Get the id of the Router that generated this exception.
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* @return Id of the Router that generated this exception.
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*/
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public String getRouterId() {
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return this.routerId;
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}
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}
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@ -0,0 +1,150 @@
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/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.hadoop.hdfs.server.federation.router;
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import static org.apache.hadoop.util.Time.now;
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import java.util.concurrent.TimeUnit;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.hdfs.DFSConfigKeys;
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import org.apache.hadoop.hdfs.server.federation.store.StateStoreService;
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import org.apache.hadoop.util.Time;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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/**
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* Service to periodically check if the {@link org.apache.hadoop.hdfs.server.
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* federation.store.StateStoreService StateStoreService} cached information in
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* the {@link Router} is up to date. This is for performance and removes the
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* {@link org.apache.hadoop.hdfs.server.federation.store.StateStoreService
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* StateStoreService} from the critical path in common operations.
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*/
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public class RouterSafemodeService extends PeriodicService {
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private static final Logger LOG =
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LoggerFactory.getLogger(RouterSafemodeService.class);
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/** Router to manage safe mode. */
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private final Router router;
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/** Interval in ms to wait post startup before allowing RPC requests. */
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private long startupInterval;
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/** Interval in ms after which the State Store cache is too stale. */
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private long staleInterval;
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/** Start time in ms of this service. */
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private long startupTime;
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/** The time the Router enters safe mode in milliseconds. */
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private long enterSafeModeTime = now();
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/**
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* Create a new Cache update service.
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*
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* @param router Router containing the cache.
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*/
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public RouterSafemodeService(Router router) {
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super(RouterSafemodeService.class.getSimpleName());
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this.router = router;
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}
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/**
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* Enter safe mode.
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*/
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private void enter() {
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LOG.info("Entering safe mode");
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enterSafeModeTime = now();
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RouterRpcServer rpcServer = router.getRpcServer();
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rpcServer.setSafeMode(true);
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router.updateRouterState(RouterServiceState.SAFEMODE);
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}
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/**
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* Leave safe mode.
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*/
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private void leave() {
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// Cache recently updated, leave safemode
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long timeInSafemode = now() - enterSafeModeTime;
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LOG.info("Leaving safe mode after {} milliseconds", timeInSafemode);
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RouterMetrics routerMetrics = router.getRouterMetrics();
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if (routerMetrics == null) {
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LOG.error("The Router metrics are not enabled");
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} else {
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routerMetrics.setSafeModeTime(timeInSafemode);
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}
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RouterRpcServer rpcServer = router.getRpcServer();
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rpcServer.setSafeMode(false);
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router.updateRouterState(RouterServiceState.RUNNING);
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}
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@Override
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protected void serviceInit(Configuration conf) throws Exception {
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// Use same interval as cache update service
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this.setIntervalMs(conf.getTimeDuration(
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DFSConfigKeys.DFS_ROUTER_CACHE_TIME_TO_LIVE_MS,
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DFSConfigKeys.DFS_ROUTER_CACHE_TIME_TO_LIVE_MS_DEFAULT,
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TimeUnit.MILLISECONDS));
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this.startupInterval = conf.getTimeDuration(
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DFSConfigKeys.DFS_ROUTER_SAFEMODE_EXTENSION,
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DFSConfigKeys.DFS_ROUTER_SAFEMODE_EXTENSION_DEFAULT,
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TimeUnit.MILLISECONDS);
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LOG.info("Leave startup safe mode after {} ms", this.startupInterval);
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this.staleInterval = conf.getTimeDuration(
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DFSConfigKeys.DFS_ROUTER_SAFEMODE_EXPIRATION,
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DFSConfigKeys.DFS_ROUTER_SAFEMODE_EXPIRATION_DEFAULT,
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TimeUnit.MILLISECONDS);
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LOG.info("Enter safe mode after {} ms without reaching the State Store",
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this.staleInterval);
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this.startupTime = Time.now();
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// Initializing the RPC server in safe mode, it will disable it later
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enter();
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super.serviceInit(conf);
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}
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@Override
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public void periodicInvoke() {
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long now = Time.now();
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long delta = now - startupTime;
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if (delta < startupInterval) {
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LOG.info("Delaying safemode exit for {} milliseconds...",
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this.startupInterval - delta);
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return;
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}
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RouterRpcServer rpcServer = router.getRpcServer();
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StateStoreService stateStore = router.getStateStore();
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long cacheUpdateTime = stateStore.getCacheUpdateTime();
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boolean isCacheStale = (now - cacheUpdateTime) > this.staleInterval;
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// Always update to indicate our cache was updated
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if (isCacheStale) {
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if (!rpcServer.isInSafeMode()) {
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enter();
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}
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} else if (rpcServer.isInSafeMode()) {
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// Cache recently updated, leave safe mode
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leave();
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}
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}
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}
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@ -17,6 +17,8 @@
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*/
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package org.apache.hadoop.hdfs.server.federation.store;
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import java.util.concurrent.TimeUnit;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.hdfs.DFSConfigKeys;
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import org.apache.hadoop.hdfs.server.federation.router.PeriodicService;
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@ -52,9 +54,10 @@ public StateStoreCacheUpdateService(StateStoreService stateStore) {
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@Override
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protected void serviceInit(Configuration conf) throws Exception {
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this.setIntervalMs(conf.getLong(
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this.setIntervalMs(conf.getTimeDuration(
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DFSConfigKeys.DFS_ROUTER_CACHE_TIME_TO_LIVE_MS,
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DFSConfigKeys.DFS_ROUTER_CACHE_TIME_TO_LIVE_MS_DEFAULT));
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DFSConfigKeys.DFS_ROUTER_CACHE_TIME_TO_LIVE_MS_DEFAULT,
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TimeUnit.MILLISECONDS));
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super.serviceInit(conf);
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}
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@ -5080,9 +5080,12 @@
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<property>
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<name>dfs.federation.router.cache.ttl</name>
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<value>60000</value>
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<value>1m</value>
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<description>
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How often to refresh the State Store caches in milliseconds.
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How often to refresh the State Store caches in milliseconds. This setting
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supports multiple time unit suffixes as described in
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dfs.heartbeat.interval. If no suffix is specified then milliseconds is
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assumed.
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</description>
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</property>
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@ -5130,6 +5133,35 @@
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</description>
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</property>
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<property>
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<name>dfs.federation.router.safemode.enable</name>
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<value>true</value>
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<description>
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</description>
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</property>
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<property>
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<name>dfs.federation.router.safemode.extension</name>
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<value>30s</value>
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<description>
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Time after startup that the Router is in safe mode. This setting
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supports multiple time unit suffixes as described in
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dfs.heartbeat.interval. If no suffix is specified then milliseconds is
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assumed.
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</description>
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</property>
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<property>
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<name>dfs.federation.router.safemode.expiration</name>
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<value>3m</value>
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<description>
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Time without being able to reach the State Store to enter safe mode. This
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setting supports multiple time unit suffixes as described in
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dfs.heartbeat.interval. If no suffix is specified then milliseconds is
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assumed.
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</description>
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</property>
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<property>
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<name>dfs.federation.router.monitor.namenode</name>
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<value></value>
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@ -81,6 +81,10 @@ The Routers are stateless and metadata operations are atomic at the NameNodes.
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If a Router becomes unavailable, any Router can take over for it.
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The clients configure their DFS HA client (e.g., ConfiguredFailoverProvider or RequestHedgingProxyProvider) with all the Routers in the federation as endpoints.
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* **Unavailable State Store:**
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If a Router cannot contact the State Store, it will enter into a Safe Mode state which disallows it from serving requests.
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Clients will treat Routers in Safe Mode as it was an Standby NameNode and try another Router.
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* **NameNode heartbeat HA:**
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For high availability and flexibility, multiple Routers can monitor the same NameNode and heartbeat the information to the State Store.
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This increases clients' resiliency to stale information, should a Router fail.
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@ -35,6 +35,7 @@ public class RouterConfigBuilder {
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private boolean enableStateStore = false;
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private boolean enableMetrics = false;
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private boolean enableQuota = false;
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private boolean enableSafemode = false;
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public RouterConfigBuilder(Configuration configuration) {
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this.conf = configuration;
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@ -52,6 +53,7 @@ public RouterConfigBuilder all() {
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this.enableLocalHeartbeat = true;
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this.enableStateStore = true;
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this.enableMetrics = true;
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this.enableSafemode = true;
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return this;
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}
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@ -95,6 +97,11 @@ public RouterConfigBuilder quota(boolean enable) {
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return this;
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}
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public RouterConfigBuilder safemode(boolean enable) {
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this.enableSafemode = enable;
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return this;
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}
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public RouterConfigBuilder rpc() {
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return this.rpc(true);
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}
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@ -123,6 +130,10 @@ public RouterConfigBuilder quota() {
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return this.quota(true);
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}
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public RouterConfigBuilder safemode() {
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return this.safemode(true);
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}
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public Configuration build() {
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conf.setBoolean(DFSConfigKeys.DFS_ROUTER_STORE_ENABLE,
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this.enableStateStore);
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@ -139,6 +150,8 @@ public Configuration build() {
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this.enableMetrics);
|
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conf.setBoolean(DFSConfigKeys.DFS_ROUTER_QUOTA_ENABLE,
|
||||
this.enableQuota);
|
||||
conf.setBoolean(DFSConfigKeys.DFS_ROUTER_SAFEMODE_ENABLE,
|
||||
this.enableSafemode);
|
||||
return conf;
|
||||
}
|
||||
}
|
||||
|
||||
@ -0,0 +1,192 @@
|
||||
/**
|
||||
* Licensed to the Apache Software Foundation (ASF) under one
|
||||
* or more contributor license agreements. See the NOTICE file
|
||||
* distributed with this work for additional information
|
||||
* regarding copyright ownership. The ASF licenses this file
|
||||
* to you under the Apache License, Version 2.0 (the
|
||||
* "License"); you may not use this file except in compliance
|
||||
* with the License. You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
package org.apache.hadoop.hdfs.server.federation.router;
|
||||
|
||||
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_ROUTER_CACHE_TIME_TO_LIVE_MS;
|
||||
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_ROUTER_SAFEMODE_EXPIRATION;
|
||||
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_ROUTER_SAFEMODE_EXTENSION;
|
||||
import static org.apache.hadoop.hdfs.server.federation.store.FederationStateStoreTestUtils.deleteStateStore;
|
||||
import static org.apache.hadoop.hdfs.server.federation.store.FederationStateStoreTestUtils.getStateStoreConfiguration;
|
||||
import static org.junit.Assert.assertEquals;
|
||||
import static org.junit.Assert.assertFalse;
|
||||
import static org.junit.Assert.assertTrue;
|
||||
import static org.junit.Assert.fail;
|
||||
|
||||
import java.io.IOException;
|
||||
import java.net.URISyntaxException;
|
||||
import java.util.concurrent.TimeUnit;
|
||||
|
||||
import org.apache.hadoop.conf.Configuration;
|
||||
import org.apache.hadoop.hdfs.server.federation.RouterConfigBuilder;
|
||||
import org.apache.hadoop.service.Service.STATE;
|
||||
import org.apache.hadoop.util.Time;
|
||||
import org.junit.After;
|
||||
import org.junit.AfterClass;
|
||||
import org.junit.Before;
|
||||
import org.junit.BeforeClass;
|
||||
import org.junit.Test;
|
||||
|
||||
/**
|
||||
* Test the safe mode for the {@link Router} controlled by
|
||||
* {@link RouterSafemodeService}.
|
||||
*/
|
||||
public class TestRouterSafemode {
|
||||
|
||||
private Router router;
|
||||
private static Configuration conf;
|
||||
|
||||
@BeforeClass
|
||||
public static void create() throws IOException {
|
||||
// Wipe state store
|
||||
deleteStateStore();
|
||||
// Configuration that supports the state store
|
||||
conf = getStateStoreConfiguration();
|
||||
// 2 sec startup standby
|
||||
conf.setTimeDuration(DFS_ROUTER_SAFEMODE_EXTENSION,
|
||||
TimeUnit.SECONDS.toMillis(2), TimeUnit.MILLISECONDS);
|
||||
// 1 sec cache refresh
|
||||
conf.setTimeDuration(DFS_ROUTER_CACHE_TIME_TO_LIVE_MS,
|
||||
TimeUnit.SECONDS.toMillis(1), TimeUnit.MILLISECONDS);
|
||||
// 2 sec post cache update before entering safemode (2 intervals)
|
||||
conf.setTimeDuration(DFS_ROUTER_SAFEMODE_EXPIRATION,
|
||||
TimeUnit.SECONDS.toMillis(2), TimeUnit.MILLISECONDS);
|
||||
// RPC + State Store + Safe Mode only
|
||||
conf = new RouterConfigBuilder(conf)
|
||||
.rpc()
|
||||
.safemode()
|
||||
.stateStore()
|
||||
.metrics()
|
||||
.build();
|
||||
}
|
||||
|
||||
@AfterClass
|
||||
public static void destroy() {
|
||||
}
|
||||
|
||||
@Before
|
||||
public void setup() throws IOException, URISyntaxException {
|
||||
router = new Router();
|
||||
router.init(conf);
|
||||
router.start();
|
||||
}
|
||||
|
||||
@After
|
||||
public void cleanup() throws IOException {
|
||||
if (router != null) {
|
||||
router.stop();
|
||||
router = null;
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testSafemodeService() throws IOException {
|
||||
RouterSafemodeService server = new RouterSafemodeService(router);
|
||||
server.init(conf);
|
||||
assertEquals(STATE.INITED, server.getServiceState());
|
||||
server.start();
|
||||
assertEquals(STATE.STARTED, server.getServiceState());
|
||||
server.stop();
|
||||
assertEquals(STATE.STOPPED, server.getServiceState());
|
||||
server.close();
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testRouterExitSafemode()
|
||||
throws InterruptedException, IllegalStateException, IOException {
|
||||
|
||||
assertTrue(router.getRpcServer().isInSafeMode());
|
||||
verifyRouter(RouterServiceState.SAFEMODE);
|
||||
|
||||
// Wait for initial time in milliseconds
|
||||
long interval =
|
||||
conf.getTimeDuration(DFS_ROUTER_SAFEMODE_EXTENSION,
|
||||
TimeUnit.SECONDS.toMillis(2), TimeUnit.MILLISECONDS) +
|
||||
conf.getTimeDuration(DFS_ROUTER_CACHE_TIME_TO_LIVE_MS,
|
||||
TimeUnit.SECONDS.toMillis(1), TimeUnit.MILLISECONDS);
|
||||
Thread.sleep(interval);
|
||||
|
||||
assertFalse(router.getRpcServer().isInSafeMode());
|
||||
verifyRouter(RouterServiceState.RUNNING);
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testRouterEnterSafemode()
|
||||
throws IllegalStateException, IOException, InterruptedException {
|
||||
|
||||
// Verify starting state
|
||||
assertTrue(router.getRpcServer().isInSafeMode());
|
||||
verifyRouter(RouterServiceState.SAFEMODE);
|
||||
|
||||
// We should be in safe mode for DFS_ROUTER_SAFEMODE_EXTENSION time
|
||||
long interval0 = conf.getTimeDuration(DFS_ROUTER_SAFEMODE_EXTENSION,
|
||||
TimeUnit.SECONDS.toMillis(2), TimeUnit.MILLISECONDS) - 1000;
|
||||
long t0 = Time.now();
|
||||
while (Time.now() - t0 < interval0) {
|
||||
verifyRouter(RouterServiceState.SAFEMODE);
|
||||
Thread.sleep(100);
|
||||
}
|
||||
|
||||
// We wait some time for the state to propagate
|
||||
long interval1 = 1000 + 2 * conf.getTimeDuration(
|
||||
DFS_ROUTER_CACHE_TIME_TO_LIVE_MS, TimeUnit.SECONDS.toMillis(1),
|
||||
TimeUnit.MILLISECONDS);
|
||||
Thread.sleep(interval1);
|
||||
|
||||
// Running
|
||||
assertFalse(router.getRpcServer().isInSafeMode());
|
||||
verifyRouter(RouterServiceState.RUNNING);
|
||||
|
||||
// Disable cache
|
||||
router.getStateStore().stopCacheUpdateService();
|
||||
|
||||
// Wait until the State Store cache is stale in milliseconds
|
||||
long interval2 =
|
||||
conf.getTimeDuration(DFS_ROUTER_SAFEMODE_EXPIRATION,
|
||||
TimeUnit.SECONDS.toMillis(2), TimeUnit.MILLISECONDS) +
|
||||
conf.getTimeDuration(DFS_ROUTER_CACHE_TIME_TO_LIVE_MS,
|
||||
TimeUnit.SECONDS.toMillis(1), TimeUnit.MILLISECONDS);
|
||||
Thread.sleep(interval2);
|
||||
|
||||
// Safemode
|
||||
assertTrue(router.getRpcServer().isInSafeMode());
|
||||
verifyRouter(RouterServiceState.SAFEMODE);
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testRouterRpcSafeMode()
|
||||
throws IllegalStateException, IOException {
|
||||
|
||||
assertTrue(router.getRpcServer().isInSafeMode());
|
||||
verifyRouter(RouterServiceState.SAFEMODE);
|
||||
|
||||
// If the Router is in Safe Mode, we should get a SafeModeException
|
||||
boolean exception = false;
|
||||
try {
|
||||
router.getRpcServer().delete("/testfile.txt", true);
|
||||
fail("We should have thrown a safe mode exception");
|
||||
} catch (RouterSafeModeException sme) {
|
||||
exception = true;
|
||||
}
|
||||
assertTrue("We should have thrown a safe mode exception", exception);
|
||||
}
|
||||
|
||||
private void verifyRouter(RouterServiceState status)
|
||||
throws IllegalStateException, IOException {
|
||||
assertEquals(status, router.getRouterState());
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user