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https://issues.apache.org/jira/browse/ASTERIXDB-2183?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16273994#comment-16273994
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Taewoo Kim commented on ASTERIXDB-2183:
---------------------------------------
The issue is caused by the inverted list, I think. Check
OnDiskInvertedIndexRangeSearchCursor class. It executes pinPages() to load
entire pages of a token at once.
> LSMHarness merge fails
> ----------------------
>
> Key: ASTERIXDB-2183
> URL: https://issues.apache.org/jira/browse/ASTERIXDB-2183
> Project: Apache AsterixDB
> Issue Type: Bug
> Reporter: Taewoo Kim
>
> LSMHarness merge() operation fails on indexes with the following error. All
> index types are affected.
> Nov 30, 2017 6:58:07 PM
> org.apache.hyracks.storage.am.lsm.common.impls.LSMHarness merge
> SEVERE: Failed merge operation on {"class" : "LSMInvertedIndex", "dir" :
> "/mnt/ssd/scratch/waans11/asterixdb/io1/storage/partition_4/twitter/ds_tweet_idx_text_idx",
> "memory" : 2, "disk" : 894}
> java.lang.Error: Maximum lock count exceeded
> at
> java.util.concurrent.locks.ReentrantReadWriteLock$Sync.fullTryAcquireShared(ReentrantReadWriteLock.java:528)
> at
> java.util.concurrent.locks.ReentrantReadWriteLock$Sync.tryAcquireShared(ReentrantReadWriteLock.java:488)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireShared(AbstractQueuedSynchronizer.java:1282)
> at
> java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock.lock(ReentrantReadWriteLock.java:727)
> at
> org.apache.hyracks.storage.common.buffercache.CachedPage.acquireReadLatch(CachedPage.java:120)
> at
> org.apache.hyracks.storage.am.btree.impls.BTree.acquireLatch(BTree.java:542)
> at
> org.apache.hyracks.storage.am.btree.impls.BTree.performOp(BTree.java:570)
> at
> org.apache.hyracks.storage.am.btree.impls.BTree.search(BTree.java:198)
> at
> org.apache.hyracks.storage.am.btree.impls.BTree.access$300(BTree.java:69)
> at
> org.apache.hyracks.storage.am.btree.impls.BTree$BTreeAccessor.search(BTree.java:902)
> at
> org.apache.hyracks.storage.am.lsm.invertedindex.ondisk.OnDiskInvertedIndexRangeSearchCursor.open(OnDiskInvertedIndexRangeSearchCursor.java:74)
> at
> org.apache.hyracks.storage.am.lsm.invertedindex.ondisk.OnDiskInvertedIndex$OnDiskInvertedIndexAccessor.rangeSearch(OnDiskInvertedIndex.java:463)
> at
> org.apache.hyracks.storage.am.lsm.invertedindex.impls.LSMInvertedIndexRangeSearchCursor.open(LSMInvertedIndexRangeSearchCursor.java:68)
> at
> org.apache.hyracks.storage.am.lsm.invertedindex.impls.LSMInvertedIndex.search(LSMInvertedIndex.java:223)
> at
> org.apache.hyracks.storage.am.lsm.invertedindex.impls.LSMInvertedIndex.doMerge(LSMInvertedIndex.java:353)
> at
> org.apache.hyracks.storage.am.lsm.common.impls.AbstractLSMIndex.merge(AbstractLSMIndex.java:671)
> at
> org.apache.hyracks.storage.am.lsm.common.impls.LSMHarness.merge(LSMHarness.java:574)
> at
> org.apache.hyracks.storage.am.lsm.invertedindex.impls.LSMInvertedIndexAccessor.merge(LSMInvertedIndexAccessor.java:124)
> at
> org.apache.hyracks.storage.am.lsm.common.impls.MergeOperation.call(MergeOperation.java:45)
> at
> org.apache.hyracks.storage.am.lsm.common.impls.MergeOperation.call(MergeOperation.java:30)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:744)
> This error was generated continuously until the node becomes inactive.
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