[jira] [Commented] (TAP5-1791) java.lang.StackOverflowError was thrown at org.apache.tapestry5.internal.services.ComponentEventLinkEncoderImpl.decodeComponentEventRequest(Request):243

["Eddie Lo (Commented) (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TAP5-1791?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13205953#comment-13205953 ] 

Eddie Lo commented on TAP5-1791:
--------------------------------

It is consistently reproducible using jdk1.6.0_30-x64. It cannot be reproduced using 32 bit however.

Please use following small java program and a few simple steps:
Download the attached java file.
Compile it and run it.

javac LIA25066Test.java
java -classpath . -Xms64m -Xmx1280m -Xss192k -XX:MaxPermSize=288m -Xfuture -XX:+UseCompressedOops -XX:NewRatio=7 -XX:-DoEscapeAnalysis -XX:-TieredCompilation LIA25066Test

You will get the java.lang.StackOverflowError exception.

                
> java.lang.StackOverflowError was thrown at org.apache.tapestry5.internal.services.ComponentEventLinkEncoderImpl.decodeComponentEventRequest(Request):243
> --------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: TAP5-1791
>                 URL: https://issues.apache.org/jira/browse/TAP5-1791
>             Project: Tapestry 5
>          Issue Type: Bug
>          Components: tapestry-core
>    Affects Versions: 5.3
>            Reporter: Eddie Lo
>            Priority: Critical
>
> Some path parameters will cause tapestry to get into infinite loop.
> The exact problem is caused by the combination of 3 factors:
> * A low priority bug in JVM -- http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6882582
> * A regex generated by Tapestry 3.0 
> ^/(((\w(?:\w|-)*)/)*(\w+))(\.(\w+(\.\w+)*))?(\:(\w+))?(/(.*))?
> * A long and complex enough path parameter.
> /t5/user/UserResetPasswordPage/user-id/22/reset-password-token/bHLQiMR3VD6eFTQ7Txj2y4u_HyGKiHwC9bF6dazuuf3__qhKpK3rtSbZHwB6W2dbmGCmPS1By1uq-rcZXO-Ooxd6Ire1vwPpxXUAlx3Mf15ShvJEf8r9MfWEMATS3Pyr-HaGiqqcjN2IhDtJtxnypanQkBrVPMC_APwDp7aWWZLajUAXbLn8d4-evXGarDqbUQvUGQ9oqzEAEPRt0hL5oDPwDg
> When all the the 3 factors are hit, tapestry will get into an infinite loop at   
> org.apache.tapestry5.internal.services.ComponentEventLinkEncoderImpl.decodeComponentEventRequest(Request):243
> and following exception is thrown
> [5DAC745F] java.lang.StackOverflowError
> at java.util.regex.Pattern$BranchConn.match(Pattern.java:4078)
> at java.util.regex.Pattern$BmpCharProperty.match(Pattern.java:3366)
> at java.util.regex.Pattern$Branch.match(Pattern.java:4114)
> at java.util.regex.Pattern$GroupHead.match(Pattern.java:4168)
> at java.util.regex.Pattern$Loop.match(Pattern.java:4295)
> at java.util.regex.Pattern$GroupTail.match(Pattern.java:4227)
> at java.util.regex.Pattern$BranchConn.match(Pattern.java:4078)
> at java.util.regex.Pattern$BmpCharProperty.match(Pattern.java:3366)
> at java.util.regex.Pattern$Branch.match(Pattern.java:4114)
> at java.util.regex.Pattern$GroupHead.match(Pattern.java:4168)
> at java.util.regex.Pattern$Loop.match(Pattern.java:4295)
> at java.util.regex.Pattern$GroupTail.match(Pattern.java:4227)
> at java.util.regex.Pattern$BranchConn.match(Pattern.java:4078)
> at java.util.regex.Pattern$BmpCharProperty.match(Pattern.java:3366)    
> ...
> There is a limit in java only holding the top 1024 stacks. As the frame is small this time, it have far more that 1024, the bottom is truncated and lost.
> However, I used a debugger to confirm that it is thrown from  org.apache.tapestry5.internal.services.ComponentEventLinkEncoderImpl.decodeComponentEventRequest(Request):243
> While the problem is caused by JVM bug (Oracle) and a long complex path parameters (us), it is recommended to also fix this in Tapestry to use a simpler regex.  

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