HDFS-9574. Reduce client failures during datanode restart. Contributed by Kihwal Lee.
This commit is contained in:
parent
ed18527e38
commit
38c4c14472
@ -29,6 +29,7 @@
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.Iterator;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Map;
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import java.util.Map.Entry;
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@ -72,10 +73,12 @@
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import org.apache.hadoop.io.ByteBufferPool;
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import org.apache.hadoop.ipc.RPC;
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import org.apache.hadoop.ipc.RemoteException;
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import org.apache.hadoop.ipc.RetriableException;
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import org.apache.hadoop.net.NetUtils;
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import org.apache.hadoop.security.token.SecretManager.InvalidToken;
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import org.apache.hadoop.security.token.Token;
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import org.apache.hadoop.util.IdentityHashStore;
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import org.apache.hadoop.util.StopWatch;
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import org.apache.htrace.core.SpanId;
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import org.apache.htrace.core.TraceScope;
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import org.apache.htrace.core.Tracer;
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@ -357,12 +360,18 @@ private long readBlockLength(LocatedBlock locatedblock) throws IOException {
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int replicaNotFoundCount = locatedblock.getLocations().length;
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final DfsClientConf conf = dfsClient.getConf();
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for(DatanodeInfo datanode : locatedblock.getLocations()) {
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final int timeout = conf.getSocketTimeout();
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LinkedList<DatanodeInfo> nodeList = new LinkedList<DatanodeInfo>(
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Arrays.asList(locatedblock.getLocations()));
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LinkedList<DatanodeInfo> retryList = new LinkedList<DatanodeInfo>();
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boolean isRetry = false;
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StopWatch sw = new StopWatch();
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while (nodeList.size() > 0) {
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DatanodeInfo datanode = nodeList.pop();
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ClientDatanodeProtocol cdp = null;
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try {
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cdp = DFSUtilClient.createClientDatanodeProtocolProxy(datanode,
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dfsClient.getConfiguration(), conf.getSocketTimeout(),
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dfsClient.getConfiguration(), timeout,
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conf.isConnectToDnViaHostname(), locatedblock);
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final long n = cdp.getReplicaVisibleLength(locatedblock.getBlock());
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@ -370,15 +379,19 @@ private long readBlockLength(LocatedBlock locatedblock) throws IOException {
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if (n >= 0) {
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return n;
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}
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}
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catch(IOException ioe) {
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if (ioe instanceof RemoteException &&
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(((RemoteException) ioe).unwrapRemoteException() instanceof
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ReplicaNotFoundException)) {
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// special case : replica might not be on the DN, treat as 0 length
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replicaNotFoundCount--;
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} catch (IOException ioe) {
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if (ioe instanceof RemoteException) {
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if (((RemoteException) ioe).unwrapRemoteException() instanceof
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ReplicaNotFoundException) {
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// replica is not on the DN. We will treat it as 0 length
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// if no one actually has a replica.
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replicaNotFoundCount--;
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} else if (((RemoteException) ioe).unwrapRemoteException() instanceof
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RetriableException) {
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// add to the list to be retried if necessary.
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retryList.add(datanode);
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}
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}
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DFSClient.LOG.debug("Failed to getReplicaVisibleLength from datanode {}"
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+ " for block {}", datanode, locatedblock.getBlock(), ioe);
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} finally {
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@ -386,6 +399,30 @@ private long readBlockLength(LocatedBlock locatedblock) throws IOException {
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RPC.stopProxy(cdp);
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}
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}
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// Ran out of nodes, but there are retriable nodes.
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if (nodeList.size() == 0 && retryList.size() > 0) {
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nodeList.addAll(retryList);
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retryList.clear();
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isRetry = true;
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}
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if (isRetry) {
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// start the stop watch if not already running.
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if (!sw.isRunning()) {
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sw.start();
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}
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try {
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Thread.sleep(500); // delay between retries.
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} catch (InterruptedException e) {
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throw new IOException("Interrupted while getting the length.");
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}
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}
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// see if we ran out of retry time
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if (sw.isRunning() && sw.now(TimeUnit.MILLISECONDS) > timeout) {
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break;
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}
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}
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// Namenode told us about these locations, but none know about the replica
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@ -2581,6 +2581,8 @@ Release 2.7.3 - UNRELEASED
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HDFS-7163. WebHdfsFileSystem should retry reads according to the configured
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retry policy. (Eric Payne via kihwal)
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HDFS-9574. Reduce client failures during datanode restart (kihwal)
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OPTIMIZATIONS
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BUG FIXES
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@ -507,6 +507,8 @@ public class DFSConfigKeys extends CommonConfigurationKeys {
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public static final String DFS_DATANODE_MIN_SUPPORTED_NAMENODE_VERSION_KEY = "dfs.datanode.min.supported.namenode.version";
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public static final String DFS_DATANODE_MIN_SUPPORTED_NAMENODE_VERSION_DEFAULT = "3.0.0-SNAPSHOT";
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public static final String DFS_NAMENODE_INODE_ATTRIBUTES_PROVIDER_KEY = "dfs.namenode.inode.attributes.provider.class";
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public static final String DFS_DATANODE_BP_READY_TIMEOUT_KEY = "dfs.datanode.bp-ready.timeout";
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public static final long DFS_DATANODE_BP_READY_TIMEOUT_DEFAULT = 20;
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public static final String DFS_BLOCK_ACCESS_TOKEN_ENABLE_KEY = "dfs.block.access.token.enable";
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public static final boolean DFS_BLOCK_ACCESS_TOKEN_ENABLE_DEFAULT = false;
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@ -52,6 +52,8 @@
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import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_RESTART_REPLICA_EXPIRY_DEFAULT;
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import static org.apache.hadoop.hdfs.DFSConfigKeys.IGNORE_SECURE_PORTS_FOR_TESTING_KEY;
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import static org.apache.hadoop.hdfs.DFSConfigKeys.IGNORE_SECURE_PORTS_FOR_TESTING_DEFAULT;
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import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_BP_READY_TIMEOUT_KEY;
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import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_BP_READY_TIMEOUT_DEFAULT;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.hdfs.DFSConfigKeys;
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@ -104,6 +106,8 @@ public class DNConf {
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final long maxLockedMemory;
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private final long bpReadyTimeout;
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// Allow LAZY_PERSIST writes from non-local clients?
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private final boolean allowNonLocalLazyPersist;
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@ -210,6 +214,10 @@ public DNConf(Configuration conf) {
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this.allowNonLocalLazyPersist = conf.getBoolean(
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DFS_DATANODE_NON_LOCAL_LAZY_PERSIST,
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DFS_DATANODE_NON_LOCAL_LAZY_PERSIST_DEFAULT);
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this.bpReadyTimeout = conf.getLong(
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DFS_DATANODE_BP_READY_TIMEOUT_KEY,
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DFS_DATANODE_BP_READY_TIMEOUT_DEFAULT);
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}
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// We get minimumNameNodeVersion via a method so it can be mocked out in tests.
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@ -322,4 +330,8 @@ public int getTransferSocketRecvBufferSize() {
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public int getTransferSocketSendBufferSize() {
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return transferSocketSendBufferSize;
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}
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public long getBpReadyTimeout() {
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return bpReadyTimeout;
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}
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}
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@ -1594,6 +1594,7 @@ public int getIpcPort() {
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@VisibleForTesting
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public DatanodeRegistration getDNRegistrationForBP(String bpid)
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throws IOException {
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DataNodeFaultInjector.get().noRegistration();
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BPOfferService bpos = blockPoolManager.get(bpid);
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if(bpos==null || bpos.bpRegistration==null) {
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throw new IOException("cannot find BPOfferService for bpid="+bpid);
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@ -1721,7 +1722,6 @@ FileInputStream[] requestShortCircuitFdsForRead(final ExtendedBlock blk,
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throw new ShortCircuitFdsUnsupportedException(
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fileDescriptorPassingDisabledReason);
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}
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checkBlockToken(blk, token, BlockTokenIdentifier.AccessMode.READ);
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int blkVersion = CURRENT_BLOCK_FORMAT_VERSION;
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if (maxVersion < blkVersion) {
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throw new ShortCircuitFdsVersionException("Your client is too old " +
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@ -2709,6 +2709,15 @@ public long getReplicaVisibleLength(final ExtendedBlock block) throws IOExceptio
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}
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private void checkReadAccess(final ExtendedBlock block) throws IOException {
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// Make sure this node has registered for the block pool.
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try {
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getDNRegistrationForBP(block.getBlockPoolId());
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} catch (IOException e) {
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// if it has not registered with the NN, throw an exception back.
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throw new org.apache.hadoop.ipc.RetriableException(
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"Datanode not registered. Try again later.");
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}
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if (isBlockTokenEnabled) {
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Set<TokenIdentifier> tokenIds = UserGroupInformation.getCurrentUser()
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.getTokenIdentifiers();
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@ -49,4 +49,6 @@ public void sendShortCircuitShmResponse() throws IOException {}
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public boolean dropHeartbeatPacket() {
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return false;
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}
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public void noRegistration() throws IOException { }
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}
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@ -45,6 +45,7 @@
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import java.nio.channels.ClosedChannelException;
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import java.security.MessageDigest;
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import java.util.Arrays;
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import java.util.concurrent.TimeUnit;
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import com.google.common.annotations.VisibleForTesting;
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import org.apache.commons.logging.Log;
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@ -85,6 +86,7 @@
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import org.apache.hadoop.security.token.SecretManager.InvalidToken;
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import org.apache.hadoop.security.token.Token;
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import org.apache.hadoop.util.DataChecksum;
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import org.apache.hadoop.util.StopWatch;
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import com.google.common.base.Preconditions;
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import com.google.protobuf.ByteString;
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@ -298,6 +300,9 @@ public void requestShortCircuitFds(final ExtendedBlock blk,
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SlotId slotId, int maxVersion, boolean supportsReceiptVerification)
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throws IOException {
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updateCurrentThreadName("Passing file descriptors for block " + blk);
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DataOutputStream out = getBufferedOutputStream();
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checkAccess(out, true, blk, token,
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Op.REQUEST_SHORT_CIRCUIT_FDS, BlockTokenIdentifier.AccessMode.READ);
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BlockOpResponseProto.Builder bld = BlockOpResponseProto.newBuilder();
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FileInputStream fis[] = null;
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SlotId registeredSlotId = null;
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@ -326,9 +331,6 @@ public void requestShortCircuitFds(final ExtendedBlock blk,
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} catch (ShortCircuitFdsUnsupportedException e) {
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bld.setStatus(ERROR_UNSUPPORTED);
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bld.setMessage(e.getMessage());
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} catch (InvalidToken e) {
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bld.setStatus(ERROR_ACCESS_TOKEN);
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bld.setMessage(e.getMessage());
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} catch (IOException e) {
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bld.setStatus(ERROR);
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bld.setMessage(e.getMessage());
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@ -516,9 +518,9 @@ public void readBlock(final ExtendedBlock block,
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final CachingStrategy cachingStrategy) throws IOException {
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previousOpClientName = clientName;
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long read = 0;
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updateCurrentThreadName("Sending block " + block);
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OutputStream baseStream = getOutputStream();
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DataOutputStream out = new DataOutputStream(new BufferedOutputStream(
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baseStream, smallBufferSize));
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DataOutputStream out = getBufferedOutputStream();
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checkAccess(out, true, block, blockToken,
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Op.READ_BLOCK, BlockTokenIdentifier.AccessMode.READ);
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@ -534,7 +536,6 @@ public void readBlock(final ExtendedBlock block,
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: dnR + " Served block " + block + " to " +
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remoteAddress;
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updateCurrentThreadName("Sending block " + block);
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try {
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try {
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blockSender = new BlockSender(block, blockOffset, length,
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@ -630,6 +631,10 @@ public void writeBlock(final ExtendedBlock block,
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allowLazyPersist = allowLazyPersist &&
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(dnConf.getAllowNonLocalLazyPersist() || peer.isLocal());
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long size = 0;
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// reply to upstream datanode or client
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final DataOutputStream replyOut = getBufferedOutputStream();
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checkAccess(replyOut, isClient, block, blockToken,
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Op.WRITE_BLOCK, BlockTokenIdentifier.AccessMode.WRITE);
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// check single target for transfer-RBW/Finalized
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if (isTransfer && targets.length > 0) {
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throw new IOException(stage + " does not support multiple targets "
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@ -660,11 +665,6 @@ public void writeBlock(final ExtendedBlock block,
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LOG.info("Receiving " + block + " src: " + remoteAddress + " dest: "
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+ localAddress);
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// reply to upstream datanode or client
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final DataOutputStream replyOut = getBufferedOutputStream();
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checkAccess(replyOut, isClient, block, blockToken,
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Op.WRITE_BLOCK, BlockTokenIdentifier.AccessMode.WRITE);
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DataOutputStream mirrorOut = null; // stream to next target
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DataInputStream mirrorIn = null; // reply from next target
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Socket mirrorSock = null; // socket to next target
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@ -863,13 +863,13 @@ public void transferBlock(final ExtendedBlock blk,
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final String clientName,
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final DatanodeInfo[] targets,
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final StorageType[] targetStorageTypes) throws IOException {
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checkAccess(socketOut, true, blk, blockToken,
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Op.TRANSFER_BLOCK, BlockTokenIdentifier.AccessMode.COPY);
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previousOpClientName = clientName;
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updateCurrentThreadName(Op.TRANSFER_BLOCK + " " + blk);
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final DataOutputStream out = new DataOutputStream(
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getOutputStream());
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checkAccess(out, true, blk, blockToken,
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Op.TRANSFER_BLOCK, BlockTokenIdentifier.AccessMode.COPY);
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try {
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datanode.transferReplicaForPipelineRecovery(blk, targets,
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targetStorageTypes, clientName);
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@ -923,6 +923,7 @@ private MD5Hash calcPartialBlockChecksum(ExtendedBlock block,
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@Override
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public void blockChecksum(final ExtendedBlock block,
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final Token<BlockTokenIdentifier> blockToken) throws IOException {
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updateCurrentThreadName("Getting checksum for block " + block);
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final DataOutputStream out = new DataOutputStream(
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getOutputStream());
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checkAccess(out, true, block, blockToken,
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@ -933,13 +934,11 @@ public void blockChecksum(final ExtendedBlock block,
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long visibleLength = datanode.data.getReplicaVisibleLength(block);
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boolean partialBlk = requestLength < visibleLength;
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updateCurrentThreadName("Reading metadata for block " + block);
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final LengthInputStream metadataIn = datanode.data
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.getMetaDataInputStream(block);
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final DataInputStream checksumIn = new DataInputStream(
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new BufferedInputStream(metadataIn, ioFileBufferSize));
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updateCurrentThreadName("Getting checksum for block " + block);
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try {
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//read metadata file
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final BlockMetadataHeader header = BlockMetadataHeader
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@ -987,21 +986,10 @@ public void blockChecksum(final ExtendedBlock block,
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public void copyBlock(final ExtendedBlock block,
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final Token<BlockTokenIdentifier> blockToken) throws IOException {
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updateCurrentThreadName("Copying block " + block);
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// Read in the header
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if (datanode.isBlockTokenEnabled) {
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try {
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datanode.blockPoolTokenSecretManager.checkAccess(blockToken, null, block,
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BlockTokenIdentifier.AccessMode.COPY);
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} catch (InvalidToken e) {
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LOG.warn("Invalid access token in request from " + remoteAddress
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+ " for OP_COPY_BLOCK for block " + block + " : "
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+ e.getLocalizedMessage());
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sendResponse(ERROR_ACCESS_TOKEN, "Invalid access token");
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return;
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}
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DataOutputStream reply = getBufferedOutputStream();
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checkAccess(reply, true, block, blockToken,
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Op.COPY_BLOCK, BlockTokenIdentifier.AccessMode.COPY);
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}
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if (datanode.data.getPinning(block)) {
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String msg = "Not able to copy block " + block.getBlockId() + " " +
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"to " + peer.getRemoteAddressString() + " because it's pinned ";
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@ -1019,7 +1007,6 @@ public void copyBlock(final ExtendedBlock block,
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}
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BlockSender blockSender = null;
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DataOutputStream reply = null;
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boolean isOpSuccess = true;
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try {
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@ -1027,10 +1014,7 @@ public void copyBlock(final ExtendedBlock block,
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blockSender = new BlockSender(block, 0, -1, false, false, true, datanode,
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null, CachingStrategy.newDropBehind());
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// set up response stream
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OutputStream baseStream = getOutputStream();
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reply = new DataOutputStream(new BufferedOutputStream(
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baseStream, smallBufferSize));
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// send status first
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writeSuccessWithChecksumInfo(blockSender, reply);
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@ -1074,20 +1058,9 @@ public void replaceBlock(final ExtendedBlock block,
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final String delHint,
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final DatanodeInfo proxySource) throws IOException {
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updateCurrentThreadName("Replacing block " + block + " from " + delHint);
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/* read header */
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if (datanode.isBlockTokenEnabled) {
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try {
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datanode.blockPoolTokenSecretManager.checkAccess(blockToken, null, block,
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BlockTokenIdentifier.AccessMode.REPLACE);
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} catch (InvalidToken e) {
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LOG.warn("Invalid access token in request from " + remoteAddress
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+ " for OP_REPLACE_BLOCK for block " + block + " : "
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+ e.getLocalizedMessage());
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sendResponse(ERROR_ACCESS_TOKEN, "Invalid access token");
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return;
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}
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}
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DataOutputStream replyOut = new DataOutputStream(getOutputStream());
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checkAccess(replyOut, true, block, blockToken,
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Op.REPLACE_BLOCK, BlockTokenIdentifier.AccessMode.REPLACE);
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if (!dataXceiverServer.balanceThrottler.acquire()) { // not able to start
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String msg = "Not able to receive block " + block.getBlockId() +
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@ -1104,7 +1077,6 @@ public void replaceBlock(final ExtendedBlock block,
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String errMsg = null;
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BlockReceiver blockReceiver = null;
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DataInputStream proxyReply = null;
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DataOutputStream replyOut = new DataOutputStream(getOutputStream());
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boolean IoeDuringCopyBlockOperation = false;
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try {
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// Move the block to different storage in the same datanode
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@ -1296,11 +1268,52 @@ private void incrDatanodeNetworkErrors() {
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datanode.incrDatanodeNetworkErrors(remoteAddressWithoutPort);
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}
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/**
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* Wait until the BP is registered, upto the configured amount of time.
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* Throws an exception if times out, which should fail the client request.
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* @param the requested block
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*/
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void checkAndWaitForBP(final ExtendedBlock block)
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throws IOException {
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String bpId = block.getBlockPoolId();
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// The registration is only missing in relatively short time window.
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// Optimistically perform this first.
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try {
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datanode.getDNRegistrationForBP(bpId);
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return;
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} catch (IOException ioe) {
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// not registered
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}
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// retry
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long bpReadyTimeout = dnConf.getBpReadyTimeout();
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StopWatch sw = new StopWatch();
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sw.start();
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while (sw.now(TimeUnit.SECONDS) <= bpReadyTimeout) {
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try {
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datanode.getDNRegistrationForBP(bpId);
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return;
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} catch (IOException ioe) {
|
||||
// not registered
|
||||
}
|
||||
// sleep before trying again
|
||||
try {
|
||||
Thread.sleep(1000);
|
||||
} catch (InterruptedException ie) {
|
||||
throw new IOException("Interrupted while serving request. Aborting.");
|
||||
}
|
||||
}
|
||||
// failed to obtain registration.
|
||||
throw new IOException("Not ready to serve the block pool, " + bpId + ".");
|
||||
}
|
||||
|
||||
private void checkAccess(OutputStream out, final boolean reply,
|
||||
final ExtendedBlock blk,
|
||||
final Token<BlockTokenIdentifier> t,
|
||||
final Op op,
|
||||
final BlockTokenIdentifier.AccessMode mode) throws IOException {
|
||||
checkAndWaitForBP(blk);
|
||||
if (datanode.isBlockTokenEnabled) {
|
||||
if (LOG.isDebugEnabled()) {
|
||||
LOG.debug("Checking block access token for block '" + blk.getBlockId()
|
||||
|
@ -2721,4 +2721,14 @@
|
||||
</description>
|
||||
</property>
|
||||
|
||||
<property>
|
||||
<name>dfs.datanode.bp-ready.timeout</name>
|
||||
<value>20</value>
|
||||
<description>
|
||||
The maximum wait time for datanode to be ready before failing the
|
||||
received request. Setting this to 0 fails requests right away if the
|
||||
datanode is not yet registered with the namenode. This wait time
|
||||
reduces initial request failures after datanode restart.
|
||||
</description>
|
||||
</property>
|
||||
</configuration>
|
||||
|
@ -25,6 +25,7 @@
|
||||
import org.apache.hadoop.hdfs.protocol.*;
|
||||
import org.apache.hadoop.hdfs.protocol.datatransfer.*;
|
||||
import org.apache.hadoop.hdfs.server.datanode.metrics.DataNodeMetrics;
|
||||
import org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration;
|
||||
import org.apache.hadoop.util.DataChecksum;
|
||||
import static org.apache.hadoop.hdfs.DFSConfigKeys.*;
|
||||
|
||||
@ -162,17 +163,20 @@ private static Peer getMockPeer(PeerLocality locality) {
|
||||
return peer;
|
||||
}
|
||||
|
||||
private static DataNode getMockDn(NonLocalLazyPersist nonLocalLazyPersist) {
|
||||
private static DataNode getMockDn(NonLocalLazyPersist nonLocalLazyPersist)
|
||||
throws IOException {
|
||||
Configuration conf = new HdfsConfiguration();
|
||||
conf.setBoolean(
|
||||
DFS_DATANODE_NON_LOCAL_LAZY_PERSIST,
|
||||
nonLocalLazyPersist == NonLocalLazyPersist.ALLOWED);
|
||||
DNConf dnConf = new DNConf(conf);
|
||||
DatanodeRegistration mockDnReg = mock(DatanodeRegistration.class);
|
||||
DataNodeMetrics mockMetrics = mock(DataNodeMetrics.class);
|
||||
DataNode mockDn = mock(DataNode.class);
|
||||
when(mockDn.getDnConf()).thenReturn(dnConf);
|
||||
when(mockDn.getConf()).thenReturn(conf);
|
||||
when(mockDn.getMetrics()).thenReturn(mockMetrics);
|
||||
when(mockDn.getDNRegistrationForBP("Dummy-pool")).thenReturn(mockDnReg);
|
||||
return mockDn;
|
||||
}
|
||||
}
|
||||
|
@ -38,6 +38,7 @@
|
||||
import org.apache.hadoop.hdfs.protocol.Block;
|
||||
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.ReplicaState;
|
||||
import org.apache.hadoop.hdfs.server.datanode.DataNode;
|
||||
import org.apache.hadoop.hdfs.server.datanode.DataNodeFaultInjector;
|
||||
import org.apache.hadoop.hdfs.server.datanode.DataNodeTestUtils;
|
||||
import org.apache.hadoop.hdfs.server.datanode.DatanodeUtil;
|
||||
import org.apache.hadoop.hdfs.server.datanode.ReplicaInfo;
|
||||
@ -146,4 +147,75 @@ private void testRbwReplicas(MiniDFSCluster cluster, boolean isCorrupt)
|
||||
private static FsDatasetImpl dataset(DataNode dn) {
|
||||
return (FsDatasetImpl)DataNodeTestUtils.getFSDataset(dn);
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testWaitForRegistrationOnRestart() throws Exception {
|
||||
Configuration conf = new HdfsConfiguration();
|
||||
conf.setLong(DFSConfigKeys.DFS_DATANODE_BP_READY_TIMEOUT_KEY, 5);
|
||||
conf.setInt(HdfsClientConfigKeys.DFS_CLIENT_SOCKET_TIMEOUT_KEY, 5000);
|
||||
|
||||
// This makes the datanode appear registered to the NN, but it won't be
|
||||
// able to get to the saved dn reg internally.
|
||||
DataNodeFaultInjector dnFaultInjector = new DataNodeFaultInjector() {
|
||||
@Override
|
||||
public void noRegistration() throws IOException {
|
||||
throw new IOException("no reg found for testing");
|
||||
}
|
||||
};
|
||||
DataNodeFaultInjector oldDnInjector = DataNodeFaultInjector.get();
|
||||
DataNodeFaultInjector.set(dnFaultInjector);
|
||||
MiniDFSCluster cluster = null;
|
||||
long start = 0;
|
||||
Path file = new Path("/reg");
|
||||
try {
|
||||
int numDNs = 1;
|
||||
cluster = new MiniDFSCluster.Builder(conf).numDataNodes(numDNs).build();
|
||||
cluster.waitActive();
|
||||
|
||||
start = System.currentTimeMillis();
|
||||
FileSystem fileSys = cluster.getFileSystem();
|
||||
try {
|
||||
DFSTestUtil.createFile(fileSys, file, 10240L, (short)1, 0L);
|
||||
// It is a bug if this does not fail.
|
||||
throw new IOException("Did not fail!");
|
||||
} catch (org.apache.hadoop.ipc.RemoteException e) {
|
||||
long elapsed = System.currentTimeMillis() - start;
|
||||
// timers have at-least semantics, so it should be at least 5 seconds.
|
||||
if (elapsed < 5000 || elapsed > 10000) {
|
||||
throw new IOException(elapsed + " seconds passed.", e);
|
||||
}
|
||||
}
|
||||
DataNodeFaultInjector.set(oldDnInjector);
|
||||
// this should succeed now.
|
||||
DFSTestUtil.createFile(fileSys, file, 10240L, (short)1, 0L);
|
||||
|
||||
// turn it back to under-construction, so that the client calls
|
||||
// getReplicaVisibleLength() rpc method against the datanode.
|
||||
fileSys.append(file);
|
||||
// back to simulating unregistered node.
|
||||
DataNodeFaultInjector.set(dnFaultInjector);
|
||||
byte[] buffer = new byte[8];
|
||||
start = System.currentTimeMillis();
|
||||
try {
|
||||
fileSys.open(file).read(0L, buffer, 0, 1);
|
||||
throw new IOException("Did not fail!");
|
||||
} catch (IOException e) {
|
||||
long elapsed = System.currentTimeMillis() - start;
|
||||
if (e.getMessage().contains("readBlockLength")) {
|
||||
throw new IOException("Failed, but with unexpected exception:", e);
|
||||
}
|
||||
// timers have at-least semantics, so it should be at least 5 seconds.
|
||||
if (elapsed < 5000 || elapsed > 10000) {
|
||||
throw new IOException(elapsed + " seconds passed.", e);
|
||||
}
|
||||
}
|
||||
DataNodeFaultInjector.set(oldDnInjector);
|
||||
fileSys.open(file).read(0L, buffer, 0, 1);
|
||||
} finally {
|
||||
DataNodeFaultInjector.set(oldDnInjector);
|
||||
if (cluster != null) {
|
||||
cluster.shutdown();
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user