OCI 11gR2 Trapping Linux Signals
Greetings,
Is there any documentation that might allude to any possible changed signal behavior with OCI for 11gR2 on Linux platform?
We currently have handlers that call abort() as well as dedicated SEGV and other handlers that are appearing to be broken when run as background processes when linked with Oracle 11gR2 OCI libraries. This would be under RH 5.4 and using Oracle Client for 11gR2. For example, when we call abort(), no core is dropped in certain background processes. If we first set the default handler- either through signal SIG_DFL or with sigaction prior to calling abort(), this drops a core as expected. If we link with other libraries, this problem also goes away.
What we really need is some way to ensure cores are dropped or what to setup to collect cores. Our work-around for abort() works for those occasions, but we're now losing executables with no trace and no core to be found only when linking with OCI 11gR2 libraries.
Any insights greatly appreciated! Thank you!
Edited by: 785338 on Jul 29, 2010 6:00 PM
See also: Re: Oracle-DB-Client 11R2 with perl-DBD: Eating Signal CTRL-C
Edited by: Ulrich Weiss on May 4, 2011 1:53 AM
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|#]
I have used the classes12.jar and ojdbc.jar which came with the download and nothing seems to work. A bit surprising when sqlplus works and not the application. I suspect there could be an issue with the driver class. I have been struggling to figure this out for days now...
Can anyone please share their thoughts if something similar was observed earlier please.
Any quick help will highly be appreciated.ORACLE_HOME=/opt/instantclient_10_2
export ORACLE_HOMEYou don't set ORACLE_HOME with Instant Client.
PATH=$PATH:$LD_LIBRARY_PATH
export PATHThis is unnecessary.
CLASSPATH=/opt/instantclient_10_2:/opt/instantclient_10_2/ojdbc.jar
export CLASSPATHThis is wrong.
It should be:
CLASSPATH=/opt/instantclient_10_2/ojdbc14.jar:<whatever else you need there>
Java.library.path=/opt/instantclient_10_2
export Java.library.pathThis is useless; java.library.path is not an environment variable.
java.lang.UnsatisfiedLinkError: no ocijdbc10 in java.library.pathThe case is pretty clear. You want to use the OCI driver (your URL starts with "jdbc:oracle:oci:"), so the Java Virtual Machine is looking for libocijdbc10.so in the Java library path but cannot find it.
What is also clear is that the program does not use the CLASSPATH environment variable you set, because then it would never have found the Oracle Driver.
So it seems that your program is ignoring the environment you set (which would explain why it also ignores LD_LIBRARY_PATH which you set correctly).
You must have the environment variables set and exported in the shell that starts the "java" executable.
Also, check that there is no other ojdbc14.jar on this machine (use "find").
To help you debug your problem, let me explain how Sun Java sets Java library path on Linux:
- If you start java with "java -Djava.library.path=/some/dir:/other/dir ...", the Java library path is set to exactly that value.
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Yours,
Laurenz Albe -
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HTH -
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-- thanks
nullORACLE_HOME=/opt/instantclient_10_2
export ORACLE_HOMEYou don't set ORACLE_HOME with Instant Client.
PATH=$PATH:$LD_LIBRARY_PATH
export PATHThis is unnecessary.
CLASSPATH=/opt/instantclient_10_2:/opt/instantclient_10_2/ojdbc.jar
export CLASSPATHThis is wrong.
It should be:
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Java.library.path=/opt/instantclient_10_2
export Java.library.pathThis is useless; java.library.path is not an environment variable.
java.lang.UnsatisfiedLinkError: no ocijdbc10 in java.library.pathThe case is pretty clear. You want to use the OCI driver (your URL starts with "jdbc:oracle:oci:"), so the Java Virtual Machine is looking for libocijdbc10.so in the Java library path but cannot find it.
What is also clear is that the program does not use the CLASSPATH environment variable you set, because then it would never have found the Oracle Driver.
So it seems that your program is ignoring the environment you set (which would explain why it also ignores LD_LIBRARY_PATH which you set correctly).
You must have the environment variables set and exported in the shell that starts the "java" executable.
Also, check that there is no other ojdbc14.jar on this machine (use "find").
To help you debug your problem, let me explain how Sun Java sets Java library path on Linux:
- If you start java with "java -Djava.library.path=/some/dir:/other/dir ...", the Java library path is set to exactly that value.
- If you do not specify -Djava.library.path, the Java library path is taken from the environment variable LD_LIBRARY_PATH.
- Directories listed in /etc/ld.so.conf have no influence on the Java library path (which gave me quite a headache in the beginning).
Do you really need the OCI Driver? If you can do with the Thin Driver (i.e., use an URL that starts with "jdbc:oracle:thin:") you don't need any shared libraries at all.
Yours,
Laurenz Albe -
Oracle insert sessions not failover to node1 in 11gr2 suse linux 2 node rac
Hi all,
I already setup a 2 node oracle 11gr2 rac and setup is installaed fine. in baseline testing insert sessions are not failovering to the node1. scenario i do as follows.
Scenario 1 - We ran an insert query in both Nodes and unplugged the Node2 interconnect wires from the server. In which case the Node2 insert session should failover to Node1 without any interruption to the users and the Node2 CRS( Cluster Ready Services) should reboot.
Scenario 2 - We ran the insert queries and unplugged Node 1 interconnections from the server. In this scenario also Node2 CRS should reboot and the insert session should failover to Node2.
please let me know any one have face this issue.
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Kanchana.Hi,
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Install 11gR2 on Linux 6 with ASM for production environment ?
Hi Experts
Plz I hope someone could help me, I am planning to Install Oracle 11g R2(11.2.0.3)
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My doubt is: Is it a stable combination ? someone has experience working with this version ? is there some Oracle documents to support this implementation on Production ?
I have been installing and working with 11g R2 on Oracle Linux 5 (5.7,5.8) with ASM for some time and I didn’t have problems, it’s very stable combination
My situation is this: Our client insist on use Oracle Linux 6 on a new Oracle implementation, even when we told her Oracle Linux 5 its Very stable, so that’s why I am asking for some advice, because it’s a production environment 7x24.
Thank you for your time and advice
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Edited by: J.A. on 7/05/2013 07:29 AMHmmmm:
-Question:
My doubt is: Is it a stable combination ? someone has experience working with this version ? is there some Oracle documents to support this implementation on Production ?-Your Answer:
I have been installing and working with 11g R2 on Oracle Linux 5 (5.7,5.8) with ASM for some time and I didn’t have problems, it’s very stable combination-My answer:
Your answer +1
If you have installed it before but only a lower OS version, you know how to install it, no differences between 5.7-5.8 and 6. -
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