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https://issues.apache.org/jira/browse/HADOOP-13264?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15328425#comment-15328425
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Seb Mo edited comment on HADOOP-13264 at 6/13/16 11:31 PM:
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Linked to the related ticket on which a sudden failure causes the JVM to die
with OutOfMemory. In that test I was trying to migrate a couple of million
files while the datanode ran out of diskspace. This caused the client to die,
although I was calling close on the stream (using java8 close with resource),
but since that failed, the mentioned map caused my JVM to die.
Created a simple test that attempts a write while the datanode is down.
was (Author: sebyonthenet):
Linked to the related ticket on which a sudden failure causes the JVM to die
with OutOfMemory. In that test I was trying to migrate a couple of million
files while the datanode ran out of diskspace. This caused by client to die,
although I was calling close on the stream, but since that failed, the
mentioned map caused by JVM to die.
Created a simple test that attempts a write while the datanode is down.
> Hadoop HDFS - DFSOutputStream close method fails to clean up resources in
> case no hdfs datanodes are accessible
> ----------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-13264
> URL: https://issues.apache.org/jira/browse/HADOOP-13264
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 2.7.2
> Reporter: Seb Mo
>
> Using:
> hadoop-hdfs\2.7.2\hadoop-hdfs-2.7.2-sources.jar!\org\apache\hadoop\hdfs\DFSOutputStream.java
> Close method fails when the client can't connect to any data nodes. When
> re-using the same DistributedFileSystem in the same JVM, if all the datanodes
> can't be accessed, then this causes a memory leak as the
> DFSClient#filesBeingWritten map is never cleared after that.
> See test program provided by [~sebyonthenet] in comments below.
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