RPC on Datanode blocked forever.
--------------------------------
Key: HADOOP-4672
URL: https://issues.apache.org/jira/browse/HADOOP-4672
Project: Hadoop Core
Issue Type: Bug
Components: dfs, io
Affects Versions: 0.17.0
Environment: Java SE 1.6.0-b105 on Linux 2.6.x
Reporter: Raghu Angadi
We recently noticed a number of datanodes got stuck. The main thread that sends
heartbeats and block reports is blocked in select() in side blockReport() RPC.
I will add a stack trace in the next comment.
I am not sure why select was blocked forever since there is no connection open
to NameNode. In fact, NN was restarted in between. It could be some JDK bug or
a Hadoop bug.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
