Hi Gordon,

yes, it looks exactly like the issue described in QPID-4524. It seems
strange to me that the issue was closed with a statement - expected
behavior. I have increased the sync_op_timeout to 5 minutes, but it just
delayed the same error on the client. It is also not a store performance
problem, since I can send 300 messages (all 1MB size) using C++ client in
under a minute without any problem (using async sender). I am attaching logs
again.

nosync_6.log <http://qpid.2158936.n2.nabble.com/file/n7644270/nosync_6.log>  
nosync_cpp.log
<http://qpid.2158936.n2.nabble.com/file/n7644270/nosync_cpp.log>  

To me it seems like a misunderstanding between Java JMS client and C++
broker when using 0-10 protocol. It cannot be the case that broker is simply
not able to process two consecutive 1MB messages within 5 minutes. I can
understand that with 1MB (and more) messages the async mode doesn't bring
much performance gain, however it should work.

Thanks.




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