Íñigo Goiri created HDFS-14608:
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Summary: DataNode$DataTransfer should be named
Key: HDFS-14608
URL: https://issues.apache.org/jira/browse/HDFS-14608
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Íñigo Goiri
Fix For: 3.3.0
Currently, the {{DataTransfer}} thread has no name and it just outputs the
default {{toString()}}.
This shows in the logs in jstack as something like:
{code}
2019-06-25 11:01:01,211 INFO
[org.apache.hadoop.hdfs.server.datanode.DataNode$DataTransfer@609ed67a]
org.apache.hadoop.hdfs.server.datanode.DataNode: DataTransfer, at
CO4AEAP0000C1AF:10010: Transmitted
BP-1191059133-10.1.2.3-1458888702348:blk_1113379522_69745835 (numBytes=485214)
to 10.1.2.3/10.1.2.3:10010
{code}
As this uses the {{Daemon}} class, the name is set based on:
{code}
public Daemon(Runnable runnable) {
super(runnable);
this.runnable = runnable;
this.setName(((Object)runnable).toString());
}
{code}
We should implement toString to at least have the name of the block being
transfferred or something similar to what DataXceiver does (e.g., HDFS-3375).
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