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https://issues.apache.org/jira/browse/HADOOP-4635?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12646671#action_12646671
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mofleury edited comment on HADOOP-4635 at 11/11/08 1:39 PM:
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It seems that there really is a leak...
Using top, I am monitoring the amount of memory used by fuse_dfs on one of the
machines.
The percentage went from 6.8 % to 8.1 % in 2-3 hours. I will continue tracking
the memory usage to get some more insight.
was (Author: mofleury):
After some further testing, I notified that the amount of memory used by
fuse_dfs is of about 70MB (varies from a machine to the other).
I tried to use vmstat to see if a lot of paging was involved, and it does not
seem to be the case.
I might just have done a report for an unexisting bug, I apologize if it is the
case, an am in any way ready to do as many tests as needed to get a better
understanding of the situation.
> Memory leak ?
> -------------
>
> Key: HADOOP-4635
> URL: https://issues.apache.org/jira/browse/HADOOP-4635
> Project: Hadoop Core
> Issue Type: Bug
> Components: contrib/fuse-dfs
> Affects Versions: 0.20.0
> Reporter: Marc-Olivier Fleury
>
> I am running a process that needs to crawl a tree structure containing ~10K
> images, copy the images to the local disk, process these images, and copy
> them back to HDFS.
> My problem is the following : after about 10h of processing, the processes
> crash, complaining about a std::bad_alloc exception (I use hadoop pipes to
> run existing software). When running fuse_dfs in debug mode, I get an
> outOfMemoryError, telling that there is no more room in the heap.
> While the process is running, using top or ps, I notice that fuse is using up
> an increasing amount of memory, until some limit is reached. At that point ,
> the memory used is oscillating. I suppose that this is due to the use of the
> virtual memory.
> This leads me to the conclusion that there is some memory leak in fuse_dfs,
> since the only other programs running are Hadoop and the existing software,
> both thoroughly tested in the past.
> My problem is that my knowledge concerning memory leak tracking is rather
> limited, so I will need some instructions to get more insight concerning this
> issue.
> Thank you
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