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https://issues.apache.org/jira/browse/HDFS-14179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16737369#comment-16737369
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Íñigo Goiri commented on HDFS-14179:
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Thanks [~surendrasingh], I didn't pay attention to the default conf value.
Not best practice here to be honest.
How much code churn would it be to pass the configuration or the value all the
way here?
I would prefer to use that.
> BlockReaderRemote#readNextPacket() should log the waiting time for packet
> read.
> -------------------------------------------------------------------------------
>
> Key: HDFS-14179
> URL: https://issues.apache.org/jira/browse/HDFS-14179
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs-client
> Affects Versions: 3.0.0
> Reporter: Surendra Singh Lilhore
> Assignee: Shubham Dewan
> Priority: Major
> Labels: newbie
> Attachments: HDFS-14179.001.patch, HDFS-14179.002.patch
>
>
> Sometime read is reported very slow due to disk or some other reason.
> {{BlockReaderRemote#readNextPacket()}} should print the datanode IP and
> waiting time in trace log.
> {code:java}
> //Read packet headers.
> packetReceiver.receiveNextPacket(in);
> PacketHeader curHeader = packetReceiver.getHeader();
> curDataSlice = packetReceiver.getDataSlice();
> assert curDataSlice.capacity() == curHeader.getDataLen();
> LOG.trace("DFSClient readNextPacket got header {}", curHeader);{code}
>
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