While restarting the managed server we are getting below error in the .out logs. But application and everything is working fine.
<Error> <Socket> <BEA-000438> <Unable to load performance pack. Using Java I/O instead. Please ensure that a native performance library is in: ‘/oracle/Installable/jdk1.6.0_38/jdk38/jdk1.6.0_38/jre/lib/sparcv9/server
<Notice> <Security> <BEA-090082> <Security initializing using security realm myrealm.>
<Warning> <Store> <BEA-280109> <Unable to load the native wlfileio library for the persistent file store “_WLS_AdminServer”. The store will use buffered I/O. The store is still operating in a transactionally safe synchronous mode. See store open log messages for the requested and final write policies.>
Solution: Add the below arguments in two managed servers in java argument for server startup tab in weblogic admin console.
Then just bounce the managed server and this error got rectified in managed servers.