DFS Write pipeline does not detect defective datanode correctly if it times out.
--------------------------------------------------------------------------------
Key: HADOOP-3339
URL: https://issues.apache.org/jira/browse/HADOOP-3339
Project: Hadoop Core
Issue Type: Bug
Components: dfs
Affects Versions: 0.16.0
Reporter: Raghu Angadi
Assignee: Raghu Angadi
When DFSClient is writing to DFS, it does not correctly detect the culprit
datanode (rather datanodes do not inform) properly. Say, the last datanode in
in 3 node pipeline is is too slow or defective. In this case, pipeline removes
the first two datanodes in first two attempts. The third attempt has only the
3rd datanode in the pipeline and it will fail too. If the pipeline detects the
bad 3rd node when the first failure occurs, the write will succeed in the
second attempt.
I will attach example logs of such cases. I think this should be fixed in
0.17.x.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
