FTP Polling Adapter Unresponsive or Hangs Once in Month

Hi,
We have 3-4 services in BPEL 11g which polls data from the FTP server .But out of which one services hangs or Unresponsive (once in months).Due To which files are not picked up from FTP server. Others services are working fine.
Currently, we are monitoring this interface and bounce FTP Adapter (sometimes even SOA Servers as well) in order to prevent this scenario.You are therefore, kindly request to suggest a permanent fix to this problem.
Regards,
Dumesh Kumar

http://docs.oracle.com/cd/E14571_01/core.1111/e10108/adapters.htm#BABCICBB
15.2.1 Inbound Throttling Best Practices
Increase the thread count
paste this line in ur composite.xml under " <binding.jca config=..... .jca/>"
<property name="ThreadCount" value="40"/>

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