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Issue Type:
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![Bug]() Bug
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Affects Versions:
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1.1.1 |
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Assignee:
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Logback dev list
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Attachments:
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TokenizerTest.gz |
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Components:
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logback-classic, logback-core |
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Created:
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20/Mar/14 5:42 PM
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Description:
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An empty string literal passed to property substitution will generate an NPE.
The problem seems to lie in the changes that were made to the ch.qos.logback.core.subst.NodeToStringTransformer class. Tokenize returns a null Token in this case, which then fails at line 75 of the ch.qos.logback.core.subst.Parser class, where the switch tries to access the type filed on Token.
I have attached a small test case which you can unzip and run. The stack trace below should appear on stderr.
Unexpected error, server was not started: this is probably a bug.
java.lang.NullPointerException
at ch.qos.logback.core.subst.Parser.T(Parser.java:75)
at ch.qos.logback.core.subst.Parser.E(Parser.java:50)
at ch.qos.logback.core.subst.Parser.parse(Parser.java:46)
at ch.qos.logback.core.subst.NodeToStringTransformer.tokenizeAndParseString(NodeToStringTransformer.java:55)
at ch.qos.logback.core.subst.NodeToStringTransformer.handleVariable(NodeToStringTransformer.java:96)
at ch.qos.logback.core.subst.NodeToStringTransformer.compileNode(NodeToStringTransformer.java:72)
at ch.qos.logback.core.subst.NodeToStringTransformer.transform(NodeToStringTransformer.java:60)
at ch.qos.logback.core.subst.NodeToStringTransformer.substituteVariable(NodeToStringTransformer.java:48)
at ch.qos.logback.core.util.OptionHelper.substVars(OptionHelper.java:117)
at ch.qos.logback.core.joran.spi.InterpretationContext.subst(InterpretationContext.java:159)
at ch.qos.logback.core.joran.action.NestedBasicPropertyIA.body(NestedBasicPropertyIA.java:87)
at ch.qos.logback.core.joran.spi.Interpreter.callBodyAction(Interpreter.java:295)
at ch.qos.logback.core.joran.spi.Interpreter.characters(Interpreter.java:175)
at ch.qos.logback.core.joran.spi.EventPlayer.play(EventPlayer.java:57)
at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:149)
at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:135)
at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:99)
at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:76)
at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:68)
at LogbackTokenizerTest.main(LogbackTokenizerTest.java:17)
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Environment:
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Confirmed for 1.1.1 on Linux x86_64, but I doubt it is platform dependent.
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Project:
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logback
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Labels:
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substitution
properties
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Priority:
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![Major]() Major
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Reporter:
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Albert Louis Rossi
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