[DERBY-6442] NPE when loading optional tools from multiple threads

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 10.10.1.1
• Component/s: Tools
• Urgency: Normal
• Issue & fix info: Repro attached
• Assignee: Unassigned
• Reporter: Knut Anders Hatlen
• Created: 30/Dec/13 19:28
• Updated: 06/Mar/14 08:06
• Resolved: 06/Mar/14 08:06

Description

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)

Issue Links

• is duplicated by: DERBY-6496 Optional tool registration may fail because the CompilerContext is not always available at execution time.
• relates to: DERBY-6496 Optional tool registration may fail because the CompilerContext is not always available at execution time.