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question asked: Jul 03 '13, 3:44 p.m.
question was seen: 5,187 times
last updated: Jul 04 '13, 2:01 p.m.

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Jazz Build Engine fails in printToBuildLog and crashes when receiving build request

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Frederic Mora (138●1●15●18) | asked Jul 03 '13, 3:44 p.m.
We upgraded from RTC 3 to RTC 4 a few months ago. Today, we took a machine formerly configured as an RTC3 Jazz Build Engine and installed the RTC  4 build system toolkit on it.

When started, the build engine comes up and shows up in the RTC build engine list. However, when we submit a build request to this engine, the JBE java process crashes with the following exception in its log:


Exception in thread "Thread-7" java.lang.NullPointerException at com.ibm.team.build.internal.engine.BuildLoop.printToBuildLog(BuildLoop.java:1528) at com.ibm.team.build.internal.engine.BuildLoop.printSubstitutedProperties(BuildLoop.java:613) at com.ibm.team.build.internal.engine.BuildLoop.performPropertyVariableSubstitutions(BuildLoop.java:583) at com.ibm.team.build.internal.engine.BuildLoop.runLoop(BuildLoop.java:461) at com.ibm.team.build.internal.engine.BuildLoop$1.run(BuildLoop.java:211) at java.lang.Thread.run(Thread.java:738)

This is a new one, apparently nobody saw that failure before.
Developers, any idea?




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Frederic Mora (138●1●15●18) | answered Jul 03 '13, 4:51 p.m.
I found the problem. It turns out that since we migrated from RTC 3, the previous version of the JBE used to run on this machine. This JBE v3 left behind a .metadata directory in the location specified by the -data JBE option.

Obviously, JBE v4 found it and promptly crashed.

Solution: remove the .metadata directory and start JBE again.

This is NOT an expected or acceptable behavior. Updating RTC 3 to RTC 4 is both supported and recommended, so why does the JBE upgrade have this kind of pitfalls?

Suggestion:
1.  Put out a technote with the exception quoted so search engines can find the technote by looking up the exception text, explaining what precautions to take when migrating JBE
2. Supply a jbe-migration-checker program to run as part of the migration. The program will verify that the old metadata dir has been removed, and whatever other pitfall checks are required.


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Heather Fraser-Dube commented Jul 04 '13, 9:40 a.m.
JAZZ DEVELOPER

Which release did you upgrade to? 4.0 ifix1  4.0.0.1? 4.0.1? a different release?

Frederic Mora commented Jul 04 '13, 2:01 p.m.

Our version is 4.0.1.

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