Are you sure this generator is thread safe ?
----- Original Message ----- From: "Neeme Praks" <[EMAIL PROTECTED]> To: "bcel-dev" <[EMAIL PROTECTED]> Sent: Tuesday, June 03, 2003 9:54 AM Subject: org.apache.bcel.classfile.ClassFormatException: Invalid method signature...
Does anyone have any idea, under what circumstances the following error could happen?
Unable to create new instance org.apache.bcel.classfile.ClassFormatException: Invalid method signature:
java/lang/Long;Ljava/lang/Long;Lcom/inpoc/srv/parameters/ServiceParameters;) V
at org.apache.bcel.classfile.Utility.typeOfSignature(Utility.java:1024)
org.apache.avalon.fortress.impl.handler.ThreadSafeComponentHandler.doPrepare (ThreadSafeComponentHandler.java:72)
I'm not familiar with Avalon, but BCEL really is not thread safe. Some of the methods in Utility use static variables. If two parts of a program both use BCEL (using the same ClassLoader context) then they'll have to coordinate amongst themselves not to use it at the same time.
The actual signature should be:
(Lcom/inpoc/srv/messages/RequestMessage;Ljava/lang/Long;Ljava/lang/Long;Lcom /inpoc/srv/parameters/ServiceParameters;)V
And the error is not really 100% reproduceable, sometimes it shows up, sometimes not...
Certain sounds like a thread problem.
I have a large patch somewhere to fix BCELs static variable problems (amongst other things). When I work out how, I'll post it some time... In the mean time a quick synchronized around affected methods in BCEL should fix it.
Tom Hawtin -- http://www.tackline.demon.co.uk/ Unemployed Java Developer of Central London.
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