Andy Seaborne created JENA-1237:
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Summary: TIM not isolating trasnactions at the start
Key: JENA-1237
URL: https://issues.apache.org/jira/browse/JENA-1237
Project: Apache Jena
Issue Type: Bug
Affects Versions: Jena 3.1.0
Reporter: Andy Seaborne
Attachments: ReportTxn.java
TIM is not creating the transaction isolation when {{begin(READ)}} is called
but on the first operation.
The attached example has two other-thread actions that differ only in whether
the begin is followed by a dataset read action (thread 2) or not (thread 1).
This changes the output of otherwise identical actions.
{{ThreadAction}} takes 3 parts - the first part executes before the {{create}}
returns, the second part when {{run}} is called and exceptions captured, the
3rd part is clearup (called during {{run}}).
Annotated output from the attached program:
{noformat}
DatasetGraphInMemory
thread 1:1 : x=<no count>
Main : other1
thread 2:1 : x=0
Main : other2
Main 1 : x=0
Main 2 : x=1
thread 1:2 : x=1 ** Should be zero **
thread 2:2 : x=0
TDBDataset
thread 1:1 : x=<no count>
Main : other1
thread 2:1 : x=0
Main : other2
Main 1 : x=0
Main 2 : x=1
thread 1:2 : x=0 ** Correctly zero **
thread 2:2 : x=0
{noformat}
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