[ https://issues.apache.org/jira/browse/HDFS-13540?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Xiao Chen updated HDFS-13540: ----------------------------- Attachment: HDFS-13540.05.patch > 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 > > > 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: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org