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https://issues.apache.org/jira/browse/HDFS-2994?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13257533#comment-13257533
]
Brahma Reddy Battula commented on HDFS-2994:
--------------------------------------------
Both scenario's after append,fail write(by renaming or restating DN) and then
client should be closed.. like following..then append again.
{code}
DistributedFileSystem dfs = initHDFS();
try { writeFile(dfs, hdfsFile, out, 1,true);
out=appendFile(dfs,hdfsFile);
} writeFile(dfs, hdfsFile, out, 1,true);
catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
finally {
if (dfs != null)
{
dfs.close();
}
}
{code}
> If lease is recovered successfully inline with create, create can fail
> ----------------------------------------------------------------------
>
> Key: HDFS-2994
> URL: https://issues.apache.org/jira/browse/HDFS-2994
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 0.24.0
> Reporter: Todd Lipcon
>
> I saw the following logs on my test cluster:
> {code}
> 2012-02-22 14:35:22,887 INFO
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem: startFile: recover lease
> [Lease. Holder: DFSClient_attempt_1329943893604_0007_m_000376_0_453973131_1,
> pendingcreates: 1], src=/benchmarks/TestDFSIO/io_data/test_io_6 from client
> DFSClient_attempt_1329943893604_0007_m_000376_0_453973131_1
> 2012-02-22 14:35:22,887 INFO
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Recovering lease=[Lease.
> Holder: DFSClient_attempt_1329943893604_0007_m_000376_0_453973131_1,
> pendingcreates: 1], src=/benchmarks/TestDFSIO/io_data/test_io_6
> 2012-02-22 14:35:22,888 WARN org.apache.hadoop.hdfs.StateChange: BLOCK*
> internalReleaseLease: All existing blocks are COMPLETE, lease removed, file
> closed.
> 2012-02-22 14:35:22,888 WARN org.apache.hadoop.hdfs.StateChange: DIR*
> FSDirectory.replaceNode: failed to remove
> /benchmarks/TestDFSIO/io_data/test_io_6
> 2012-02-22 14:35:22,888 WARN org.apache.hadoop.hdfs.StateChange: DIR*
> NameSystem.startFile: FSDirectory.replaceNode: failed to remove
> /benchmarks/TestDFSIO/io_data/test_io_6
> {code}
> It seems like, if {{recoverLeaseInternal}} succeeds in {{startFileInternal}},
> then the INode will be replaced with a new one, meaning the later
> {{replaceNode}} call can fail.
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