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 some path parameters will cause tapestry getting 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
{noformat}
^/(((\w(?:\w|-)*)/)*(\w+))(\.(\w+(\.\w+)*))?(\:(\w+))?(/(.*))?
{noformat}
* A long and complex enough path parameter.
{noformat}
http://platform1-regression.qa.lithium.com/t5/user/UserResetPasswordPage/user-id/22/reset-password-token/bHLQiMR3VD6eFTQ7Txj2y4u_HyGKiHwC9bF6dazuuf3__qhKpK3rtSbZHwB6W2dbmGCmPS1By1uq-rcZXO-Ooxd6Ire1vwPpxXUAlx3Mf15ShvJEf8r9MfWEMATS3Pyr-HaGiqqcjN2IhDtJtxnypanQkBrVPMC_APwDp7aWWZLajUAXbLn8d4-evXGarDqbUQvUGQ9oqzEAEPRt0hL5oDPwDg
{noformat}
When all the the 3 factors are hit, tapestry will get into at
org.apache.tapestry5.internal.services.ComponentEventLinkEncoderImpl.decodeComponentEventRequest(Request):243
and following exception is thrown
{noformat}
[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)
...
{noformat}
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 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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