We were observing frequent server hangs. On taking thread dumps at the time of hang we found the following culprit
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Weblogic STUCK Thread on executing query on MS SQL Server 2008
Stuck threads were observed on Weblogic Server. Thread was stuck at this point. at java.net.SocketInputStream.socketRead0(Native Method) at java.net.SocketInputStream.read(SocketInputStream.java:129) at com.microsoft.sqlserver.jdbc.TDSChannel.read(IOBuffer.java:1579)
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