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https://issues.apache.org/jira/browse/TAJO-2000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15044365#comment-15044365
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ASF GitHub Bot commented on TAJO-2000:
--------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/tajo/pull/892
> BSTIndex can cause OOM
> ----------------------
>
> Key: TAJO-2000
> URL: https://issues.apache.org/jira/browse/TAJO-2000
> Project: Tajo
> Issue Type: Bug
> Components: Data Shuffle, Physical Operator
> Affects Versions: 0.8.0
> Reporter: Jinho Kim
> Assignee: Jinho Kim
> Fix For: 0.11.1
>
>
> BSTIndex writer collect the key and offsets for range shuffle. if keys is
> unique, collector needs large memory.
> In case of sorted dataset, dataset don’t need to keep in the memory. It
> should be written in the file immediately
> Here is the stack trace
> {noformat}
> Thread 63932: (state = BLOCKED)
> - org.apache.tajo.storage.VTuple.isBlankOrNull(int) @bci=15, line=67
> (Compiled frame; information may be imprecise)
> -
> org.apache.tajo.storage.BaseTupleComparator.compare(org.apache.tajo.storage.Tuple,
> org.apache.tajo.storage.Tuple) @bci=32, line=112 (Compiled frame)
> - org.apache.tajo.storage.BaseTupleComparator.compare(java.lang.Object,
> java.lang.Object) @bci=9, line=37 (Compiled frame)
> - java.util.TreeMap.getEntryUsingComparator(java.lang.Object) @bci=29,
> line=376 (Compiled frame)
> - java.util.TreeMap.getEntry(java.lang.Object) @bci=9, line=345 (Compiled
> frame)
> - java.util.TreeMap.containsKey(java.lang.Object) @bci=2, line=232 (Compiled
> frame)
> -
> org.apache.tajo.storage.index.bst.BSTIndex$BSTIndexWriter$KeyOffsetCollector.put(org.apache.tajo.storage.Tuple,
> long) @bci=5, line=263 (Compiled frame)
> -
> org.apache.tajo.storage.index.bst.BSTIndex$BSTIndexWriter.write(org.apache.tajo.storage.Tuple,
> long) @bci=88, line=143 (Compiled frame)
> - org.apache.tajo.engine.planner.physical.RangeShuffleFileWriteExec.next()
> @bci=78, line=108 (Compiled frame)
> - org.apache.tajo.worker.TaskImpl.run() @bci=99, line=402 (Interpreted frame)
> - org.apache.tajo.worker.TaskContainer.run() @bci=149, line=65 (Interpreted
> frame)
> - java.util.concurrent.Executors$RunnableAdapter.call() @bci=4, line=511
> (Interpreted frame)
> - java.util.concurrent.FutureTask.run() @bci=42, line=266 (Interpreted frame)
> -
> java.util.concurrent.ThreadPoolExecutor.runWorker(java.util.concurrent.ThreadPoolExecutor$Worker)
> @bci=95, line=1142 (Interpreted frame)
> - java.util.concurrent.ThreadPoolExecutor$Worker.run() @bci=5, line=617
> (Interpreted frame)
> - java.lang.Thread.run() @bci=11, line=745 (Interpreted frame)
> {noformat}
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