[
https://issues.apache.org/jira/browse/HDFS-13540?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16487106#comment-16487106
]
Hudson commented on HDFS-13540:
-------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #14263 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/14263/])
HDFS-13540. DFSStripedInputStream should only allocate new buffers when
(sammi.chen: rev 34e8b9f9a86fb03156861482643fba11bdee1dd4)
* (edit)
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/ElasticByteBufferPool.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSStripedInputStream.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDFSStripedInputStream.java
> DFSStripedInputStream should only allocate new buffers when reading
> -------------------------------------------------------------------
>
> Key: HDFS-13540
> URL: https://issues.apache.org/jira/browse/HDFS-13540
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 3.0.0
> Reporter: Xiao Chen
> Assignee: Xiao Chen
> Priority: Major
> Attachments: HDFS-13540.01.patch, HDFS-13540.02.patch,
> HDFS-13540.03.patch, HDFS-13540.04.patch, HDFS-13540.05.patch,
> HDFS-13540.06.patch
>
>
> This was found in the same scenario where HDFS-13539 is caught.
> There are 2 OOM that looks interesting:
> {noformat}
> FSDataInputStream#close error:
> OutOfMemoryError: Direct buffer memoryjava.lang.OutOfMemoryError: Direct
> buffer memory
> at java.nio.Bits.reserveMemory(Bits.java:694)
> at java.nio.DirectByteBuffer.<init>(DirectByteBuffer.java:123)
> at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:311)
> at
> org.apache.hadoop.io.ElasticByteBufferPool.getBuffer(ElasticByteBufferPool.java:95)
> at
> org.apache.hadoop.hdfs.DFSStripedInputStream.resetCurStripeBuffer(DFSStripedInputStream.java:118)
> at
> org.apache.hadoop.hdfs.DFSStripedInputStream.closeCurrentBlockReaders(DFSStripedInputStream.java:205)
> at
> org.apache.hadoop.hdfs.DFSInputStream.close(DFSInputStream.java:672)
> at
> org.apache.hadoop.hdfs.DFSStripedInputStream.close(DFSStripedInputStream.java:181)
> at java.io.FilterInputStream.close(FilterInputStream.java:181)
> {noformat}
> and
> {noformat}
> org/apache/hadoop/fs/FSDataInputStream#unbuffer failed: error:
> OutOfMemoryError: Direct buffer memoryjava.lang.OutOfMemoryError: Direct
> buffer memory
> at java.nio.Bits.reserveMemory(Bits.java:694)
> at java.nio.DirectByteBuffer.<init>(DirectByteBuffer.java:123)
> at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:311)
> at
> org.apache.hadoop.io.ElasticByteBufferPool.getBuffer(ElasticByteBufferPool.java:95)
> at
> org.apache.hadoop.hdfs.DFSStripedInputStream.resetCurStripeBuffer(DFSStripedInputStream.java:118)
> at
> org.apache.hadoop.hdfs.DFSStripedInputStream.closeCurrentBlockReaders(DFSStripedInputStream.java:205)
> at
> org.apache.hadoop.hdfs.DFSInputStream.unbuffer(DFSInputStream.java:1782)
> at
> org.apache.hadoop.fs.StreamCapabilitiesPolicy.unbuffer(StreamCapabilitiesPolicy.java:48)
> at
> org.apache.hadoop.fs.FSDataInputStream.unbuffer(FSDataInputStream.java:230)
> {noformat}
> As the stack trace goes, {{resetCurStripeBuffer}} will get buffer from the
> buffer pool. We could save the cost of doing so if it's not for a read (e.g.
> close, unbuffer etc.)
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
