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PREEMPTIVE_COM_GETDATA


PREEMPTIVE_COM_GETDATA

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JennyYang
JennyYang
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We are running SQL2008R2 64 bit standard version.
One of the application encountered (via Tomcat service) error " database.pool.ConnectionPool Exception: com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host has failed. java.net.BindException: Address already in use: connect" when the application has high usages. I noticed there were PREEMPTIVE_COM_GETDATA wait types associated. What is the Preemptive _com_getdata wait type? or any one know what the tomcat error mean?

Thanks in advance for any response.
Jenny



SQLHeap
SQLHeap
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I am seeing the preemptive_com_getdata wait also with a db2 ole linked server connection. Did you have any resolution?

There is an exception to every rule, except this one...
Jared Karney
Jared Karney
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Did you run sp_who2 and see if there is any blocking going on? I believe we had issues with tomcat trying to open connections over and over again and it screwed things up.

Thanks,
Jared
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Aditya Kota
Aditya Kota
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Preemptive is a non-cooperative, which generally happens with processes that are running outside SQL.
This is not good for SQL Server as it is a particular external process which makes SQL Server to yield.

Sometimes it can be fixed by re-indexing/de-frag but most of the times it happens if there are a lot of Context Switches on your server. Consult your SA
ajithrnair
ajithrnair
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This may be due to the query execution from linked serevrs.
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