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https://issues.apache.org/jira/browse/HBASE-20403?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16522693#comment-16522693
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Mike Drob commented on HBASE-20403:
-----------------------------------
bq. Got a report back from an internal test cluster who was previously
reproducing this issue. With this patch applied the issue seems to be resolved.
Sounds good, you still have commit access, right? ;)
+1
> Prefetch sometimes doesn't work with encrypted file system
> ----------------------------------------------------------
>
> Key: HBASE-20403
> URL: https://issues.apache.org/jira/browse/HBASE-20403
> Project: HBase
> Issue Type: Bug
> Affects Versions: 2.0.0-beta-2
> Reporter: Umesh Agashe
> Assignee: Todd Lipcon
> Priority: Major
> Fix For: 3.0.0
>
> Attachments: hbase-20403.patch, hbase-20403.patch
>
>
> Log from long running test has following stack trace a few times:
> {code}
> 2018-04-09 18:33:21,523 WARN
> org.apache.hadoop.hbase.io.hfile.HFileReaderImpl: Prefetch
> path=hdfs://ns1/hbase/data/default/IntegrationTestBigLinkedList_20180409172704/35f1a7ef13b9d327665228abdbcdffae/meta/9089d98b2a6b4847b3fcf6aceb124988,
> offset=36884200, end=231005989
> java.lang.IllegalArgumentException
> at java.nio.Buffer.limit(Buffer.java:275)
> at
> org.apache.hadoop.hdfs.ByteBufferStrategy.readFromBlock(ReaderStrategy.java:183)
> at org.apache.hadoop.hdfs.DFSInputStream.readBuffer(DFSInputStream.java:705)
> at
> org.apache.hadoop.hdfs.DFSInputStream.readWithStrategy(DFSInputStream.java:766)
> at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:831)
> at
> org.apache.hadoop.crypto.CryptoInputStream.read(CryptoInputStream.java:197)
> at java.io.DataInputStream.read(DataInputStream.java:149)
> at
> org.apache.hadoop.hbase.io.hfile.HFileBlock.readWithExtra(HFileBlock.java:762)
> at
> org.apache.hadoop.hbase.io.hfile.HFileBlock$FSReaderImpl.readAtOffset(HFileBlock.java:1559)
> at
> org.apache.hadoop.hbase.io.hfile.HFileBlock$FSReaderImpl.readBlockDataInternal(HFileBlock.java:1771)
> at
> org.apache.hadoop.hbase.io.hfile.HFileBlock$FSReaderImpl.readBlockData(HFileBlock.java:1594)
> at
> org.apache.hadoop.hbase.io.hfile.HFileReaderImpl.readBlock(HFileReaderImpl.java:1488)
> at
> org.apache.hadoop.hbase.io.hfile.HFileReaderImpl$1.run(HFileReaderImpl.java:278)
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
> {code}
> Size on disk calculations seem to get messed up due to encryption. Possible
> fixes can be:
> * if file is encrypted with FileStatus#isEncrypted() and do not prefetch.
> * document that hbase.rs.prefetchblocksonopen cannot be true if file is
> encrypted.
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