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https://issues.apache.org/jira/browse/HDFS-11882?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16149881#comment-16149881
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Andrew Wang commented on HDFS-11882:
------------------------------------
Thanks for taking a look Kai, I can update the patch tomorrow once you've had
time to fully digest the patch.
bq. About "Parity cells are the length of the longest data cells", didn't quite
follow and could you clarify some bit?
When there's a partially written stripe, we might have data lengths [10, 5, 0]
and parity lengths [10, 10]. The parity cells are the length of the longest
data cell (10). There could be multiple full data cells, so I made it plural.
> Client fails if acknowledged size is greater than bytes sent
> ------------------------------------------------------------
>
> Key: HDFS-11882
> URL: https://issues.apache.org/jira/browse/HDFS-11882
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: erasure-coding, test
> Reporter: Akira Ajisaka
> Assignee: Andrew Wang
> Priority: Critical
> Labels: hdfs-ec-3.0-must-do
> Attachments: HDFS-11882.01.patch, HDFS-11882.02.patch,
> HDFS-11882.03.patch, HDFS-11882.04.patch, HDFS-11882.05.patch,
> HDFS-11882.regressiontest.patch
>
>
> Some tests of erasure coding fails by the following exception. The following
> test was removed by HDFS-11823, however, this type of error can happen in
> real cluster.
> {noformat}
> Running
> org.apache.hadoop.hdfs.TestDFSRSDefault10x4StripedOutputStreamWithFailure
> Tests run: 14, Failures: 0, Errors: 1, Skipped: 10, Time elapsed: 89.086 sec
> <<< FAILURE! - in
> org.apache.hadoop.hdfs.TestDFSRSDefault10x4StripedOutputStreamWithFailure
> testMultipleDatanodeFailure56(org.apache.hadoop.hdfs.TestDFSRSDefault10x4StripedOutputStreamWithFailure)
> Time elapsed: 38.831 sec <<< ERROR!
> java.lang.IllegalStateException: null
> at
> com.google.common.base.Preconditions.checkState(Preconditions.java:129)
> at
> org.apache.hadoop.hdfs.DFSStripedOutputStream.updatePipeline(DFSStripedOutputStream.java:780)
> at
> org.apache.hadoop.hdfs.DFSStripedOutputStream.checkStreamerFailures(DFSStripedOutputStream.java:664)
> at
> org.apache.hadoop.hdfs.DFSStripedOutputStream.closeImpl(DFSStripedOutputStream.java:1034)
> at
> org.apache.hadoop.hdfs.DFSOutputStream.close(DFSOutputStream.java:842)
> at
> org.apache.hadoop.fs.FSDataOutputStream$PositionCache.close(FSDataOutputStream.java:72)
> at
> org.apache.hadoop.fs.FSDataOutputStream.close(FSDataOutputStream.java:101)
> at
> org.apache.hadoop.hdfs.TestDFSStripedOutputStreamWithFailure.runTest(TestDFSStripedOutputStreamWithFailure.java:472)
> at
> org.apache.hadoop.hdfs.TestDFSStripedOutputStreamWithFailure.runTestWithMultipleFailure(TestDFSStripedOutputStreamWithFailure.java:381)
> at
> org.apache.hadoop.hdfs.TestDFSStripedOutputStreamWithFailure.testMultipleDatanodeFailure56(TestDFSStripedOutputStreamWithFailure.java:245)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> at
> org.junit.internal.runners.statements.FailOnTimeout$StatementThread.run(FailOnTimeout.java:74)
> {noformat}
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