Major Description
This was found in the same scenario where HDFS-13539 is caught.
There are 2 OOM that looks interesting:
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)
and
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)
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.)