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Posted to notifications@asterixdb.apache.org by "Abdullah Alamoudi (JIRA)" <ji...@apache.org> on 2015/10/22 01:54:27 UTC
[jira] [Commented] (ASTERIXDB-1146) Cleaning up left-overs once the
query is done - External datasets
[ https://issues.apache.org/jira/browse/ASTERIXDB-1146?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14968194#comment-14968194 ]
Abdullah Alamoudi commented on ASTERIXDB-1146:
----------------------------------------------
Will handle this one today.
Cheers,
> Cleaning up left-overs once the query is done - External datasets
> ------------------------------------------------------------------
>
> Key: ASTERIXDB-1146
> URL: https://issues.apache.org/jira/browse/ASTERIXDB-1146
> Project: Apache AsterixDB
> Issue Type: Bug
> Components: AsterixDB
> Reporter: Pouria
> Assignee: Abdullah Alamoudi
> Priority: Minor
>
> Running queries which use external datasets for a long time, without restarting the asterixdb instance in between, causes the number of open files grow, and it can eventually break the system.
> Using 'lsof' command , it seems that there are left-over 'ESTABLISHED' TCP connections between NC and Datanode:
> java 7576 pouria 292u IPv4 393409691 0t0 TCP asterix-10.ics.uci.edu:46965->asterix-10.ics.uci.edu:50010 (CLOSE_WAIT)
> java 7576 pouria 293u IPv4 393412907 0t0 TCP asterix-10.ics.uci.edu:47005->asterix-10.ics.uci.edu:50010 (ESTABLISHED)
> …
> java 32205 pouria 576u IPv4 393415126 0t0 TCP asterix-10.ics.uci.edu:50010->asterix-10.ics.uci.edu:47056 (ESTABLISHED)
> java 32205 pouria 586u IPv4 393414645 0t0 TCP asterix-10.ics.uci.edu:50010->asterix-10.ics.uci.edu:47045 (ESTABLISHED)
> …
> Here is the error upon system breakage from CC logs:
> org.apache.hyracks.api.exceptions.HyracksDataException: org.apache.hyracks.api.exceptions.HyracksDataException: org.apache.hyracks.api.exceptions.HyracksDataException: java.io.IOException: Too many open files
> at org.apache.hyracks.control.common.utils.ExceptionUtils.setNodeIds(ExceptionUtils.java:45)
> at org.apache.hyracks.control.nc.Task.run(Task.java:312)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: org.apache.hyracks.api.exceptions.HyracksDataException: org.apache.hyracks.api.exceptions.HyracksDataException: java.io.IOException: Too many open files
> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:358)
> at org.apache.hyracks.control.nc.Task.run(Task.java:290)
> ... 3 more
> Caused by: org.apache.hyracks.api.exceptions.HyracksDataException: java.io.IOException: Too many open files
> at org.apache.hyracks.control.nc.io.IOManager.createWorkspaceFile(IOManager.java:171)
> at org.apache.hyracks.control.nc.io.WorkspaceFileFactory.createManagedWorkspaceFile(WorkspaceFileFactory.java:39)
> at org.apache.hyracks.control.nc.Joblet.createManagedWorkspaceFile(Joblet.java:262)
> at org.apache.hyracks.dataflow.std.join.OptimizedHybridHashJoin.buildWrite(OptimizedHybridHashJoin.java:332)
> at org.apache.hyracks.dataflow.std.join.OptimizedHybridHashJoin.spillPartition(OptimizedHybridHashJoin.java:311)
> at org.apache.hyracks.dataflow.std.join.OptimizedHybridHashJoin.processTuple(OptimizedHybridHashJoin.java:237)
> at org.apache.hyracks.dataflow.std.join.OptimizedHybridHashJoin.build(OptimizedHybridHashJoin.java:215)
> at org.apache.hyracks.dataflow.std.join.OptimizedHybridHashJoinOperatorDescriptor$PartitionAndBuildActivityNode$1.nextFrame(OptimizedHybridHashJoinOperatorDescriptor.java:313)
> at org.apache.hyracks.control.nc.Task.pushFrames(Task.java:342)
> ... 4 more
> Caused by: java.io.IOException: Too many open files
> at java.io.UnixFileSystem.createFileExclusively(Native Method)
> at java.io.File.createNewFile(File.java:1006)
> at java.io.File.createTempFile(File.java:1989)
> at org.apache.hyracks.control.nc.io.IOManager.createWorkspaceFile(IOManager.java:169)
> ... 12 more
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