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https://issues.apache.org/jira/browse/HDFS-2452?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13128594#comment-13128594
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Uma Maheswara Rao G commented on HDFS-2452:
-------------------------------------------
I just verified trunk code and security barnch code. There we handled one more
case for AsynchronousCloseException.
{code}
} catch (SocketTimeoutException ignored) {
// wake up to see if should continue to run
} catch (AsynchronousCloseException ace) {
// another thread closed our listener socket - that's expected during
shutdown,
// but not in other circumstances
if (datanode.shouldRun) {
LOG.warn(datanode.getMachineName() + ":DataXceiverServer: ", ace);
}
} catch (IOException ie) {
LOG.warn(datanode.getMachineName() + ":DataXceiverServer: ", ie);
} catch (Throwable te) {
LOG.error(datanode.getMachineName()
+ ":DataXceiverServer: Exiting due to: ", te);
datanode.shouldRun = false;
}
{code}
This particular AsynchronousCloseException is missed in 22 branch. Is it
intentional for 22?
In security branch, handling is different
{code}
catch (AsynchronousCloseException ace) {
LOG.warn(datanode.dnRegistration + ":DataXceiveServer:"
+ StringUtils.stringifyException(ace));
datanode.shouldRun = false;
}
{code}
here setting datanode.shouldRun = false. So, here it is just for logging?
I am confusing about this exception handling here. why it is different for
branch by branch?
thanks
Uma
> OutOfMemoryError in DataXceiverServer takes down the DataNode
> -------------------------------------------------------------
>
> Key: HDFS-2452
> URL: https://issues.apache.org/jira/browse/HDFS-2452
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: data-node
> Affects Versions: 0.22.0
> Reporter: Konstantin Shvachko
> Fix For: 0.22.0
>
>
> OutOfMemoryError brings down DataNode, when DataXceiverServer tries to spawn
> a new data transfer thread.
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