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https://issues.apache.org/jira/browse/HDFS-3375?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13269983#comment-13269983
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Todd Lipcon commented on HDFS-3375:
-----------------------------------
Since this just changes thread names, no new unit tests. I did verify manually
on a cluster with jstack output:
- While uploading a file:
"DataXceiver for client DFSClient_NONMAPREDUCE_-769101204_1 at /127.0.0.1:45087
[Receiving block
BP-1115842170-127.0.0.1-1336423035296:blk_1601307317176587197_1002]" daemon
prio=10 tid=0x0000000040ff6000 nid=0x6215 runnable [0x00007fe5188c8000]
- While downloading the same file
"DataXceiver for client DFSClient_NONMAPREDUCE_-412315870_1 at /127.0.0.1:51891
[Sending block
BP-1115842170-127.0.0.1-1336423035296:blk_1601307317176587197_1002]" daemon
prio=10 tid=0x0000000040bb8000 nid=0xa83 runnable [0x00007fe5188c9000]
- During keepalive:
"DataXceiver for client DFSClient_NONMAPREDUCE_-1536450876_1 at
/127.0.0.1:51896 [Waiting for operation #111]" daemon prio=10
tid=0x00000000409a3000 nid=0x38f3 runnable [0x00007fe5188c9000]
> Put client name in DataXceiver thread name for readBlock and keepalive
> ----------------------------------------------------------------------
>
> Key: HDFS-3375
> URL: https://issues.apache.org/jira/browse/HDFS-3375
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: data-node
> Affects Versions: 2.0.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Trivial
> Attachments: hdfs-3375.txt
>
>
> Currently the datanode thread names include the client for write operations,
> but not for read. We should include the client name for read ops.
> Additionally, in the keepalive phase, we should include the client name that
> initiated the previous request as well.
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