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https://issues.apache.org/jira/browse/DERBY-6442?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Knut Anders Hatlen updated DERBY-6442:
--------------------------------------
Attachment: ForeignViewMT.java
Attaching a repro for the bug. It repeatedly loads and unloads the foreignViews
tool in two threads.
> NPE when loading optional tools from multiple threads
> -----------------------------------------------------
>
> Key: DERBY-6442
> URL: https://issues.apache.org/jira/browse/DERBY-6442
> Project: Derby
> Issue Type: Bug
> Components: Tools
> Affects Versions: 10.10.1.1
> Reporter: Knut Anders Hatlen
> Attachments: ForeignViewMT.java
>
>
> When I try to load the foreignViews tool from two threads simultaneously, I
> see a NullPointerException in Java5SystemProcedures.SYSCS_REGISTER_TOOL.
> java.lang.NullPointerException
> at
> org.apache.derby.catalog.Java5SystemProcedures.SYSCS_REGISTER_TOOL(Java5SystemProcedures.java:98)
> at
> org.apache.derby.exe.ac504bc13bx0143x44f5x9203x000006cb3ed80.g0(Unknown
> Source)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at
> org.apache.derby.impl.services.reflect.ReflectMethod.invoke(ReflectMethod.java:46)
> at
> org.apache.derby.impl.sql.execute.CallStatementResultSet.open(CallStatementResultSet.java:75)
> at
> org.apache.derby.impl.sql.GenericPreparedStatement.executeStmt(GenericPreparedStatement.java:439)
> at
> org.apache.derby.impl.sql.GenericPreparedStatement.execute(GenericPreparedStatement.java:320)
> at
> org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(EmbedStatement.java:1337)
> at
> org.apache.derby.impl.jdbc.EmbedPreparedStatement.executeStatement(EmbedPreparedStatement.java:1709)
> at
> org.apache.derby.impl.jdbc.EmbedPreparedStatement.execute(EmbedPreparedStatement.java:1394)
> at ForeignViewMT$Worker.run(ForeignViewMT.java:31)
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