SocketTimeoutException: timeout while waiting for channel to be ready for read
------------------------------------------------------------------------------
Key: HDFS-770
URL: https://issues.apache.org/jira/browse/HDFS-770
Project: Hadoop HDFS
Issue Type: Bug
Components: contrib/libhdfs, data-node, hdfs client, name-node
Affects Versions: 0.20.1
Environment: Ubuntu Linux 8.04
Reporter: Leon Mergen
Attachments: client.txt, datanode.txt, namenode.txt
We're having issues with timeouts occurring in our client: for some reason, a
timeout of 63000 milliseconds is triggered while writing HDFS data. Since we
currently have a single-server setup, this results in our client terminating
with a "All datanodes are bad" IOException.
We're running all services, including the client, on our single server, so it
cannot be a network error. The load on the client is extremely low during this
period: only a few kilobytes a minute were being written around the time the
error occured.
After browsing a bit online, a lot of people talk about setting
"dfs.datanode.socket.write.timeout" to 0 as a solution for this problem. Due to
the low load of our system during this period, however, I do feel this is a
real error and a timeout that should not be occurring. I have attached 3 logs
of the namenode, datanode and client.
It could be that this is related to
http://issues.apache.org/jira/browse/HDFS-693
Any pointers on how I can assist to resolve this issue will be greatly
appreciated.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
