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MQSeries.net Forum Index » IBM MQ Java / JMS » App crashes upon readString() method

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ml_black
PostPosted: Thu Mar 11, 2004 9:07 am    Post subject: App crashes upon readString() method Reply with quote

Novice

Joined: 09 Feb 2004
Posts: 20
All was working yesterday until I messed with charactersets.

I have a Java App that reads an MQ message (MQSTR and charset 437). It then uses retrievedMessage.readString() to put the message data into a string. Everything was working fine, until I investigated charactersets yesterday. I attempted to put a message to the queue in a different charset and then retrieve it (using CONVERT on the GET). The app crashed on the readString. Now I have reset everything in the app and in my PUT utility, but the app still crashes on the readString.

I can display my message's length, format (still MQSTR) and charset (437). Any ideas why I can't do the readString?

Thanks!
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ml_black
PostPosted: Thu Mar 11, 2004 9:12 am    Post subject: Reply with quote

Novice

Joined: 09 Feb 2004
Posts: 20
I guess what I am asking is, did something get messed up because I attempted to put an incompatible characterset onto the queue?
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bower5932
PostPosted: Thu Mar 11, 2004 10:35 am    Post subject: Reply with quote

Jedi Knight

Joined: 27 Aug 2001
Posts: 3023
Location: Dallas, TX, USA
I'm not sure what 'crashed' means. I'm assuming that there is probably an exception thrown. Try catching it and put the stack trace here. I know that there are differences between bytes and strings and the length associated with them. I'd double-check that you aren't trying to read more characters than are in the string. You can search for readString and you should get some hits with more info.
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