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From Sameer Farooqui <cassandral...@gmail.com>
Subject Re: Too many open files during Repair operation
Date Tue, 19 Jul 2011 17:11:31 GMT
I'm guessing you've seen this already?
http://www.datastax.com/docs/0.8/troubleshooting/index#java-reports-an-error-saying-there-are-too-many-open-files

Check out the # of File Descriptors opened with the "lsof- -n | grep java"
command.



On Tue, Jul 19, 2011 at 8:30 AM, cbertu81@libero.it <cbertu81@libero.it>wrote:

> Hi all.
> In production we want to run nodetool repair but each time we do it we get
> the
> too many open files error.
> We've increased the number of available FD for Cassandra till 8192 but
> still
> we get the same error after few seconds.
> Should I increase it more?
>
> WARN [Thread-7] 2011-07-19 12:34:00,348 CustomTThreadPoolServer.java (line
> 131) Transport error occurred during acceptance of message.
> org.apache.thrift.transport.TTransportException: java.net.SocketException:
> Too
> many open files
>        at
> org.apache.thrift.transport.TServerSocket.acceptImpl(TServerSocket.
> java:124)
>        at org.apache.cassandra.thrift.TCustomServerSocket.acceptImpl
> (TCustomServerSocket.java:68)
>        at org.apache.cassandra.thrift.TCustomServerSocket.acceptImpl
> (TCustomServerSocket.java:39)
>        at org.apache.thrift.transport.TServerTransport.accept
> (TServerTransport.java:31)
>        at org.apache.cassandra.thrift.CustomTThreadPoolServer.serve
> (CustomTThreadPoolServer.java:121)
>        at org.apache.cassandra.thrift.CassandraDaemon$ThriftServer.run
> (CassandraDaemon.java:155)
> Caused by: java.net.SocketException: Too many open files
>        at java.net.PlainSocketImpl.socketAccept(Native Method)
>        at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:408)
>        at java.net.ServerSocket.implAccept(ServerSocket.java:462)
>        at java.net.ServerSocket.accept(ServerSocket.java:430)
>        at
> org.apache.thrift.transport.TServerSocket.acceptImpl(TServerSocket.
> java:119)
>        ... 5 more
>
>
> nodetool repair keyspacename -h host
>
> Cassandra 0.7.5, 1 cluster, 5 nodes. Each node give the same output.
> One more question: when repair start throwing this kind of exceptions (very
> fast) we stop the process of repair ... is it dangerous for data?
>
> Best Regards
>
> Carlo
>

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