[jira] [Created] (IMPALA-8521) Lots of "unreleased ByteBuffers allocated by read()" errors from HDFS client

["Tim Armstrong (JIRA)" <ji...@apache.org>]

Tim Armstrong created IMPALA-8521:
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             Summary: Lots of "unreleased ByteBuffers allocated by read()" errors from HDFS client
                 Key: IMPALA-8521
                 URL: https://issues.apache.org/jira/browse/IMPALA-8521
             Project: IMPALA
          Issue Type: Bug
          Components: Backend
            Reporter: Tim Armstrong
            Assignee: Sahil Takiar


I'm looking at some job logs and seeing a bunch of errors like this. I don't know if it's benign or if it's something more serious.

{noformat}
I0507 07:34:53.934693 20195 scan-range.cc:607] dd4d6eb8d2ad9587:6b44fe1b00000002] Cache read failed for scan range: file=hdfs://localhost:20500/test-warehouse/f861f1a3/nation.tbl disk_id=0 offset=1024  exclusive_hdfs_fh=0xec09220 num_remote_bytes=0 cancel_status= buffer_queue=0 num_buffers_in_readers=0 unused_iomgr_buffers=0 unused_iomgr_buffer_bytes=0 blocked_on_buffer=0. Switching to disk read path.
W0507 07:34:53.934787 20195 DFSInputStream.java:668] dd4d6eb8d2ad9587:6b44fe1b00000002] closing file /test-warehouse/f861f1a3/nation.tbl, but there are still unreleased ByteBuffers allocated by read().  Please release java.nio.DirectByteBufferR[pos=1024 lim=2048 cap=2199].
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