Connection Lost Contact Error Oracle
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Ora-03135 Connection Lost Contact In Oracle
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ora-03135 connection lost contact oracle 11g ORA-03135: Connection Lost Contact Tips Oracle tips by Burleson June 15, 2015 Question: I amWordpress Connection Lost Error
attempting to connect to my Oracle database and I get the ORA-03135 error: ORA-03135: connection lost contact tips What can I do to avoid the ORA-03135 error? Answer: The ora-03135 connection lost contact informatica oerr utility shows this for the ORA-03135 error: ORA-03135: connection lost contact Cause: 1) Server unexpectedly terminated or was forced to terminate. or 2) Server timed out the connection. Action: 1) Check if the server session was terminated. 2) Check if the timeout parameters are set properly in sqlnet.ora. The ORA-03135 error is common when connecting remotely when a firewall ora-03135 connection lost contact sap terminates the connection. One solution for the ORA-03135 error is to increase the value of the sqlnet.ora expire_time parameter in the sqlnet.ora file or to check for a expire parameter in a SQL*Plus profile. To diagnose the ORA-03135 error, start by checking to see if the OS PID still exists, using the ps –ef|grep syntax. Check to see if there is a Network Address Translation (NAT) between the client and server In Windows, check to see if a Windows firewall is checking for your local connections: Windows XP -> Control panel -> security -> Tab "Advanced" Also, setting the parameters sqlnet.inbound_connect_timeout and inbound_connect_timeout_listenername to 0 can stop the ORA-03135 error. Get the Complete Oracle SQL Tuning Information The landmark book "Advanced Oracle SQL Tuning The Definitive Reference" is filled with valuable information on Oracle SQL Tuning. This book includes scripts and tools to hypercharge Oracle 11g performance and you can buy it for 30% off directly from the publisher. Burleson is the American Team Note: This Oracle documentation wa
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Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up “ORA-03135: connection lost http://www.dba-oracle.com/t_ora_03135_connection_lost_contact.htm contact” when inserting large file up vote 6 down vote favorite I'm trying to do an insert with a potentially large amount of binary data into a remote Oracle (11g) database using Entity Framework (ODP.Net). It works fine for really small files (<5 KB), but for larger ones (e.g. 44 KB) I get an error: "ORA-03135: connection lost contact". I don't think it's timing out, http://stackoverflow.com/questions/12163370/ora-03135-connection-lost-contact-when-inserting-large-file as the exception occurs within a second of executing the command. I tried setting both of the following in my connection string, but to no avail: Validate Connection=true Pooling=false I also looked in the listener.log file on the remote machine. It shows the connections being made, but no sign of exceptions or terminated connections. I'm up for suggested fixes or troubleshooting methods. Edit: The same SQL operations work when accessing an Oracle instance on the local network. c# oracle odp.net share|improve this question edited Jan 5 '14 at 19:07 Guido Leenders 2,0161720 asked Aug 28 '12 at 16:12 Ishmael Smyrnow 6391623 Well maybe it is not that, but I had the "ORA-03135: connection lost contact" on weird stuff when the connection was not lost at all it only happend that Oracle was no longer able to swallow the SQL statement submitted. I got it on huge queries (>2000 line of code). Maybe I am sending you on the right track but I thought after 4 hours no answer I at least could tell you that piece of my own experience. For me it looked like the message always appears wh
HH24:MI:SS') from dual TO_CHAR(SYSDATE,'DD.MON.YYYYH ----------------------------- 28.SEP.2012 10:52:01 Elapsed: 00:00:00.01 (Delay http://stelliosdba.blogspot.com/2012/10/ora-03135-connection-lost-contact.html for 35+ minutes) SQL> r 1* select to_char(sysdate,'DD.MON.YYYY HH24:MI:SS') from dual select to_char(sysdate,'DD.MON.YYYY HH24:MI:SS') from dual * ERROR at line 1: ORA-03135: connection lost contact Elapsed: 00:05:22.63 Note the elapsed time of 5 mintes 22 seconds. To debug enable a client side SQL*net trace and connection lost reproduce the error. In this case after several tests the error occured after 30 minutes. Oracle 11.1+ database versions mask the "ORA-03135" error and return a result after the 5 minutes which may lead the DBA down the wrong path believing there is a problem with connection lost contact the database. For 11g the DIAG_ADR_ENABLED=off must be set otherwise trace files will go to the DIAGNOSTICS destination. To not interfer with other users create the SQLNET.ORA and TNSNAMES.ORA in your own directory and use them by setting the TNS_ADMIN variable. SQLNET.ORA TNSPING.TRACE_LEVEL=admin TNSPING.TRACE_DIRECTORY=/home/oracle/dba/user1/tns_admin/trace/ TRACE_LEVEL_CLIENT=admin TRACE_DIRECTORY_CLIENT=/home/oracle/dba/user1/tns_admin/trace/ TRACE_UNIQUE_CLIENT=on TRACE_TIMESTAMP_CLIENT=on TRACE_TIMESTAMP_SERVER=true TRACE_FILE_CLIENT=client_trace DIAG_ADR_ENABLED=off Information gathered in the trace file: [28-SEP-2012 11:29:21:622] nioqsm: send-break: failed to send oob break... [28-SEP-2012 11:29:21:622] nioqper: error from send-marker [28-SEP-2012 11:29:21:622] nioqper: ns main err code: 12547 [28-SEP-2012 11:29:21:622] nioqper: ns (2) err code: 12560 [28-SEP-2012 11:29:21:622] nioqper: nt main err code: 517 [28-SEP-2012 11:29:21:622] nioqper: nt (2) err code: 32 [28-SEP-2012 11:29:21:622] nioqper: nt OS err code: 0 [28-SEP-2012 11:29:21:622] nioqsm: exit [28-SEP-2012 11:29:21:622] nioqer: entry [28-SEP-2012 11:29:21:622] nioqce: entry [28-SEP-2012 11:29:21:622] nioqce: exit [28-SEP-2012 11:29:21:623] nioqer: exit [28-SEP-2012 11:29:21:623] nioqrs: nio