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extproc timeout Oracle RAC 11g makes hostname lookup extproc_connection_data

edited Jul 1, 2020 5:05AM in Database Networking (MOSC) 1 commentAnswered

Hi,

I want to share with you a very strange behavior of extproc agent. I didn't find any information about it.

We have Oracle RAC environment 11g. We use extproc with external libs for some operations.

We found that if one of the DNS servers described in resolv.conf is not available we start to receive timeout on extproc calls.

After some time searching for the problem we found that the extproc agent tries to resolve the host named "extproc_connection_data". First it asks DNS1 and receive SRVFAIL after this asks DNS2  again it receives SRVFAIL. After this it execute the request call.

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