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https://issues.apache.org/jira/browse/CASSANDRA-552?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12777663#action_12777663
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elsif commented on CASSANDRA-552:
----------------------------------
Wow, that was fast! The patch fixes the problem.
Thanks,
elsif
> file descriptor leak in getKeyRange
> -----------------------------------
>
> Key: CASSANDRA-552
> URL: https://issues.apache.org/jira/browse/CASSANDRA-552
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Reporter: Jonathan Ellis
> Assignee: Jonathan Ellis
> Fix For: 0.5
>
> Attachments: 552.patch
>
>
> paste from mailing list:
> Cassandra reported the following:
> WARN [GMFD:1] 2009-11-12 16:07:24,961 MessagingService.java (line 393)
> Exception was generated at : 11/12/2009 16:07:24 on thread GMFD:1
> Too many open files
> java.net.SocketException: Too many open files
> at sun.nio.ch.Net.socket0(Native Method)
> at sun.nio.ch.Net.socket(Unknown Source)
> at sun.nio.ch.DatagramChannelImpl.<init>(Unknown Source)
> at sun.nio.ch.SelectorProviderImpl.openDatagramChannel(Unknown
> Source)
> at java.nio.channels.DatagramChannel.open(Unknown Source)
> at
> org.apache.cassandra.net.UdpConnection.init(UdpConnection.java:49)
> at
> org.apache.cassandra.net.MessagingService.sendUdpOneWay(MessagingService.java:388)
> at
> org.apache.cassandra.gms.GossipDigestSynVerbHandler.doVerb(Gossiper.java:889)
> at
> org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:38)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown
> Source)
> at java.lang.Thread.run(Unknown Source)
> Lsof reports that the java process has 65486 files open (I have ulimit
> -n 65535 set in cassandra.in.sh). Many of the lsof entries include a
> trailing '(deleted)' comment after the file path.
> This appears to be similar to CASSANDRA-283. Anyone have a work around
> for this? Would a forced GC take care of the ones marked deleted?
> Here is my sample code to count the number of keys:
> public class CClient
> {
> public static void main(String[] args)
> throws TException, InvalidRequestException, UnavailableException,
> UnsupportedEncodingException, NotFoundException
> {
> TTransport tr = new TSocket("localhost", 9160);
> TProtocol proto = new TBinaryProtocol(tr);
> Cassandra.Client client = new Cassandra.Client(proto);
> tr.open();
> int count = 0;
> int block = 1000;
> String key = " ";
> while (true)
> {
> List<String> list = client.get_key_range("Keyspace1",
> "Standard1", key, "~", block, ConsistencyLevel.ONE);
> int size = list.size();
> if (size == 0)
> break;
> count += size;
> key = list.get(size - 1) + '~';
> System.out.println("Count: " + Integer.toString(count));
> }
> tr.close();
> }
> }
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