Concurrency bug introduced in 1.7-dev
-------------------------------------
Key: VELOCITY-669
URL: https://issues.apache.org/jira/browse/VELOCITY-669
Project: Velocity
Issue Type: Bug
Affects Versions: 1.7
Reporter: Jarkko Viinamäki
Priority: Blocker
Warning: current SVN head is broken - it fails under heavy load. I don't have
time to investigate right now but 1.6.1 release version does not have this bug
(1.6.2 release candidate may have it! - I'm not sure what's included there).
However, current SVN head fails consistently with my load testing suite when I
run it under JRat profiling:
-------------------------------------------------------------------------------
Test set: org.apache.velocity.test.load.Velocity24LoadTest
-------------------------------------------------------------------------------
Tests run: 250, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 71.032 sec
<<< FAILURE!
testRendering(org.apache.velocity.test.load.Velocity24Test) Time elapsed:
0.125 sec <<< ERROR!
java.lang.NullPointerException
at java.io.Writer.write(Writer.java:110)
at
org.apache.velocity.runtime.parser.node.ASTText.render_$jrat(ASTText.java:83)
at org.apache.velocity.runtime.parser.node.ASTText.render(ASTText.java)
at
org.apache.velocity.runtime.parser.node.ASTBlock.render_$jrat(ASTBlock.java:72)
at
org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java)
at
org.apache.velocity.runtime.directive.VelocimacroProxy.render_$jrat(VelocimacroProxy.java:222)
at
org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java)
at
org.apache.velocity.runtime.directive.RuntimeMacro.render_$jrat(RuntimeMacro.java:295)
at
org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java)
at
org.apache.velocity.runtime.directive.RuntimeMacro.render_$jrat(RuntimeMacro.java:215)
at
org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java)
at
org.apache.velocity.runtime.parser.node.ASTDirective.render_$jrat(ASTDirective.java:198)
at
org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java)
at
org.apache.velocity.runtime.parser.node.SimpleNode.render_$jrat(SimpleNode.java:342)
at
org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java)
at org.apache.velocity.Template.merge_$jrat(Template.java:340)
at org.apache.velocity.Template.merge(Template.java)
at org.apache.velocity.Template.merge_$jrat(Template.java:248)
at org.apache.velocity.Template.merge(Template.java)
at
org.apache.velocity.test.load.Velocity24Test.testRendering_$jrat(Velocity24Test.java:52)
at
org.apache.velocity.test.load.Velocity24Test.testRendering(Velocity24Test.java)
Although I'm not sure, I strongly suspect that this has got something to do
with refactoring done (2009-01-11) for VelocimacroProxy.init. In 1.6.1 the init
function initializes the nodeTree variable but if I'm not mistaken, in current
SVN head this does not happen(!). It seems that under certain conditions the
engine tries to render an ASTText node that has not been initialized (char
array is null) which causes this exception.
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