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https://issues.apache.org/jira/browse/HBASE-5776?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13537759#comment-13537759
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binlijin commented on HBASE-5776:
---------------------------------
java.lang.NullPointerException
at org.apache.hadoop.hbase.util.Bytes.compareTo(Bytes.java:940)
at
org.apache.hadoop.hbase.client.TestHTableMultiplexer.testHTableMultiplexer(TestHTableMultiplexer.java:96)
May be the put failed, I run the test local success.
mvn test -P localTests -DHBasePatchProcess
-Dtest=org.apache.hadoop.hbase.client.TestHTableMultiplexer
> HTableMultiplexer
> ------------------
>
> Key: HBASE-5776
> URL: https://issues.apache.org/jira/browse/HBASE-5776
> Project: HBase
> Issue Type: Improvement
> Reporter: Liyin Tang
> Assignee: binlijin
> Attachments: ASF.LICENSE.NOT.GRANTED--D2775.1.patch,
> ASF.LICENSE.NOT.GRANTED--D2775.1.patch,
> ASF.LICENSE.NOT.GRANTED--D2775.2.patch,
> ASF.LICENSE.NOT.GRANTED--D2775.2.patch,
> ASF.LICENSE.NOT.GRANTED--D2775.3.patch,
> ASF.LICENSE.NOT.GRANTED--D2775.4.patch,
> ASF.LICENSE.NOT.GRANTED--D2775.5.patch, HBASE-5776-trunk.patch,
> HBASE-5776-trunk-V2.patch
>
>
> There is a known issue in HBase client that single slow/dead region server
> could slow down the multiput operations across all the region servers. So the
> HBase client will be as slow as the slowest region server in the cluster.
>
> To solve this problem, HTableMultiplexer will separate the multiput
> submitting threads with the flush threads, which means the multiput operation
> will be a nonblocking operation.
> The submitting thread will shard all the puts into different queues based on
> its destination region server and return immediately. The flush threads will
> flush these puts from each queue to its destination region server.
> Currently the HTableMultiplexer only supports the put operation.
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