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Posted to dev@jena.apache.org by "Andy Seaborne (Jira)" <ji...@apache.org> on 2020/03/26 17:21:00 UTC
[jira] [Resolved] (JENA-1869) TDB2 Concurrency: StackOverflowErrors
in BPTree
[ https://issues.apache.org/jira/browse/JENA-1869?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andy Seaborne resolved JENA-1869.
---------------------------------
Fix Version/s: Jena 3.15.0
Assignee: Andy Seaborne
Resolution: Fixed
Fixed by [PR 714|https://github.com/apache/jena/pull/714].
> TDB2 Concurrency: StackOverflowErrors in BPTree
> -----------------------------------------------
>
> Key: JENA-1869
> URL: https://issues.apache.org/jira/browse/JENA-1869
> Project: Apache Jena
> Issue Type: Bug
> Components: TDB2
> Affects Versions: Jena 3.14.0
> Reporter: Bernhard Stiftner
> Assignee: Andy Seaborne
> Priority: Major
> Fix For: Jena 3.15.0
>
> Attachments: TDB2StressTest.java
>
>
> TDB2 occasionally throws StackOverflowErrors in BPTree - TDB1 apparently did not. Same background/setting as JENA-1868
> Stacktrace:
> {noformat}
> Caused by: java.lang.StackOverflowError
> at org.apache.jena.dboe.base.file.BlockAccessMapped.getByteBuffer(BlockAccessMapped.java:145)
> at org.apache.jena.dboe.base.file.BlockAccessMapped.read(BlockAccessMapped.java:90)
> at org.apache.jena.dboe.base.block.BlockMgrFileAccess.getBlock(BlockMgrFileAccess.java:71)
> at org.apache.jena.dboe.base.block.BlockMgrFileAccess.getRead(BlockMgrFileAccess.java:61)
> at org.apache.jena.dboe.base.block.BlockMgrWrapper.getRead(BlockMgrWrapper.java:46)
> at org.apache.jena.dboe.base.page.PageBlockMgr.getRead$(PageBlockMgr.java:104)
> at org.apache.jena.dboe.trans.bplustree.BPTreeNodeMgr.getRead(BPTreeNodeMgr.java:66)
> at org.apache.jena.dboe.trans.bplustree.BPTreeNodeMgr.getRead(BPTreeNodeMgr.java:36)
> at org.apache.jena.dboe.trans.bplustree.BPTreeNode.get(BPTreeNode.java:160)
> at org.apache.jena.dboe.trans.bplustree.BPTreeNode.internalInsert(BPTreeNode.java:501)
> at org.apache.jena.dboe.trans.bplustree.BPTreeNode.internalInsert(BPTreeNode.java:522)
> at org.apache.jena.dboe.trans.bplustree.BPTreeNode.internalInsert(BPTreeNode.java:522)
> at org.apache.jena.dboe.trans.bplustree.BPTreeNode.internalInsert(BPTreeNode.java:522)
> at org.apache.jena.dboe.trans.bplustree.BPTreeNode.internalInsert(BPTreeNode.java:522)
> {noformat}
> The attached "test case" manages to reproduce this issue most of the time on my machine (YMMV of course, since the test is based on quite some concurrency voodoo).
> The same test is working flawlessly when run against a TDB1 backend.
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