Bernhard Stiftner created JENA-1869:
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Summary: 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
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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