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MQSeries.net Forum Index » WebSphere DataPower » 2 instances of datapower accessing a single file twice

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WMBSAM
PostPosted: Fri Aug 16, 2013 8:13 am    Post subject: 2 instances of datapower accessing a single file twice Reply with quote

Voyager

Joined: 02 Oct 2009
Posts: 90
Location: Atlanta

Hi,

we have a issue here where we have 2 instances of datapower SFTP frontside handler polling to remote file system

occasionally say once in every 10 messages we see both the instances of SFTP frontside handlers are consumming the messages which resulting in duplication of message and hence the issue araises.

surprised how there is a file lock missing in the file polling configuration of datapower

Any thoughts?
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lancelotlinc
PostPosted: Fri Aug 16, 2013 8:36 am    Post subject: Reply with quote

Jedi Knight

Joined: 22 Mar 2010
Posts: 4941
Location: Bloomington, IL USA

What other software can you think of that has a locking feature for a polling read? None that I know of. WAS, WMB, POJO all do not lock the file system during a polling read. Your design needs to be revised.

Think about implementing a Web Service that reads the file with synchronization. Or, create a shared semaphore and ensure the semaphore is owned before the file system is polled.
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