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HDFS-4495. Allow client-side lease renewal to be retried beyond soft-limit. Contributed by Kihwal Lee

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git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1445965 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Kihwal Lee 2013-02-13 22:51:21 +00:00
parent 6bcbf492a2
commit a9974c791a
3 changed files with 25 additions and 4 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -2296,6 +2296,9 @@ Release 0.23.7 - UNRELEASED
HDFS-4288. NN accepts incremental BR as IBR in safemode (daryn via kihwal)
HDFS-4495. Allow client-side lease renewal to be retried beyond soft-limit
(kihwal)
Release 0.23.6 - UNRELEASED
INCOMPATIBLE CHANGES

4
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSClient.java
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@ -620,10 +620,10 @@ boolean renewLease() throws IOException {
} catch (IOException e) {
// Abort if the lease has already expired.
final long elapsed = Time.now() - getLastLeaseRenewal();
if (elapsed > HdfsConstants.LEASE_SOFTLIMIT_PERIOD) {
if (elapsed > HdfsConstants.LEASE_HARDLIMIT_PERIOD) {
LOG.warn("Failed to renew lease for " + clientName + " for "
+ (elapsed/1000) + " seconds (>= soft-limit ="
+ (HdfsConstants.LEASE_SOFTLIMIT_PERIOD/1000) + " seconds.) "
+ (HdfsConstants.LEASE_HARDLIMIT_PERIOD/1000) + " seconds.) "
+ "Closing all files being written ...", e);
closeAllFilesBeingWritten(true);
} else {

22
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestLease.java
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@ -41,6 +41,7 @@
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.hdfs.protocol.ClientProtocol;
import org.apache.hadoop.hdfs.protocol.HdfsConstants;
import org.apache.hadoop.hdfs.protocol.HdfsFileStatus;
import org.apache.hadoop.hdfs.server.namenode.NameNodeAdapter;
import org.apache.hadoop.hdfs.server.protocol.NamenodeProtocols;
@ -93,9 +94,26 @@ public void testLeaseAbort() throws Exception {
// We don't need to wait the lease renewer thread to act.
// call renewLease() manually.
// make it look like lease has already expired.
// make it look like the soft limit has been exceeded.
LeaseRenewer originalRenewer = dfs.getLeaseRenewer();
dfs.lastLeaseRenewal = Time.now() - 300000;
dfs.lastLeaseRenewal = Time.now()
- HdfsConstants.LEASE_SOFTLIMIT_PERIOD - 1000;
try {
dfs.renewLease();
} catch (IOException e) {}
// Things should continue to work it passes hard limit without
// renewing.
try {
d_out.write(buf, 0, 1024);
LOG.info("Write worked beyond the soft limit as expected.");
} catch (IOException e) {
Assert.fail("Write failed.");
}
// make it look like the hard limit has been exceeded.
dfs.lastLeaseRenewal = Time.now()
- HdfsConstants.LEASE_HARDLIMIT_PERIOD - 1000;
dfs.renewLease();
// this should not work.