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what can cause intermittent ora 12519 tns no appropriate handler found errors


what can cause intermittent ora 12519 tns no appropriate handler found errors  using -'oracle,junit,oracle10g,ora-12519'

We are running our Junit 4 test suite against Weblogic 9 in front of an Oracle 10 database (using Hudson as a continuous integration server) and occasionally we will get an ORA-12519 crash during script teardown.  However, the error is very intermittent:  


It usually happens for the same Test class  
It doesn't always happen for the same test cases (sometimes they pass)  
It doesn't happen for the same number of test cases (anywhere from 3-9)  
Sometimes it doesn't happen at all, everything passes  


While I can't guarantee this doesn't happen locally (when running against the same database, of course), I have run the same suite of class multiple times with no issues.

Any ideas?
    
asked Oct 7, 2015 by dahiyabecomp
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