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Matt Conway commented on CASSANDRA-1188:
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I wasn't really watching it while it was running, just checking the count of open files after.
No idea about memmapped IO in OS X, I didn't explicitly set anything up w.r.t. it anyway...
> multiget_slice calls do not close files resulting in file descriptor leak
> -------------------------------------------------------------------------
>
> Key: CASSANDRA-1188
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1188
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Affects Versions: 0.7
> Environment: Ubuntu 10.04
> Reporter: Matt Conway
> Assignee: Matthew F. Dennis
> Priority: Critical
> Fix For: 0.7
>
> Attachments: 0001-trunk-1188.patch
>
>
> Insert 1000 rows into a super column family. Read them back in a loop using multiget_slice.
Note leaked file descriptors with lsof:
> lsof -p `ps ax | grep [C]assandraDaemon | awk '{print $1}'` | awk '{print $9}' | sort
| uniq -c | sort -n | tail -n 5
> Looks like SSTableNamesIterator is never closing the files it creates via the sstable
...?
> This is similar to CASSANDRA-1178 except for use of multiget_slice instead of get_slice
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