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https://issues.apache.org/jira/browse/HBASE-14230?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14901544#comment-14901544
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Nick Dimiduk commented on HBASE-14230:
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"ltt" == "LoadTestTool", it's a performance utility we ship with HBase.
To repro from a dev sandbox, git checkout your change and build with {{mvn
clean package -DskipTests}}. Then launch a local "standalone" hbase (no HDFS),
{{./bin/start-hbase.sh}}. You can tail the log in {{logs}} to watch it come up.
Then run LoadTestTool, or any other workload. In my case, I ran {{./bin/hbase
ltt -data_block_encoding FAST_DIFF -bloom ROWCOL -num_keys 100000 -read 50
-write 10:1000}}. Once the test starts writing data, you'll see the logs fill
with the class cast warnings.
> replace reflection in FSHlog with
> HdfsDataOutputStream#getCurrentBlockReplication()
> -----------------------------------------------------------------------------------
>
> Key: HBASE-14230
> URL: https://issues.apache.org/jira/browse/HBASE-14230
> Project: HBase
> Issue Type: Improvement
> Components: wal
> Reporter: Heng Chen
> Assignee: Heng Chen
> Priority: Minor
> Fix For: 2.0.0, 1.2.0, 1.3.0
>
> Attachments: HBASE-14230.patch
>
>
> As comment TODO said, we use
> {{HdfsDataOutputStream#getCurrentBlockReplication}} and
> {{DFSOutputStream.getPipeLine}} to replace reflection in FSHlog
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