0 Replies Latest reply: Apr 12, 2013 11:17 AM by 734466 RSS

    JVM Crashes Sporadically with ORA-24550 while Running Tomcat Web App

      We have experienced a problem that has been troubling us for some time now. Our website goes down sporadically as a result of a JVM crash. The Tomcat catalina.out log reads as follows:

      # A fatal error has been detected by the Java Runtime Environment:
      # SIGSEGV (0xb) at pc=0x00002aaac5938c2b, pid=2214, tid=47766235233056
      # JRE version: 7.0_07-b10
      # Java VM: Java HotSpot(TM) 64-Bit Server VM (23.3-b01 mixed mode linux-amd64 compressed oops)
      # Problematic frame:
      # C [libclntsh.so.11.1+0x15f7c2b] nnfltimexp+0x1f
      # Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
      # An error report file with more information is saved as:
      # /usr/local/tomcat/tomcat-gbco2/logs/hs_err_pid2214.log
      # If you would like to submit a bug report, please visit:
      # http://bugreport.sun.com/bugreport/crash.jsp
      ORA-24550: signal received: [si_signo=6] [si_errno=0] [si_code=-6] [si_int=367714944] [si_ptr=0xffff810115eae280] [si_addr=0x69000008a6]

      I am no expert in reading crash logs, but I can provide it if it would be helpful.

      We are running our app on
      Intel (R) Xeon (R) CPU X5550 @ 2.67GHz with 4 cpu cores.
      CentOS Release 5.7 (Linux xena.pcbi.upenn.edu 2.6.18-274.3.1.el5 #1 SMP Tue Sep 6 20:13:52 EDT 2011 x86_64 x86_64 x86_64 GNU/Linux)
      Total server RAM: 24GB
      Tomcat 6.0.26
      Java 7.0_07-b10 (Java VM: Java HotSpot(TM) 64-Bit Server VM)
      Oracle Enterprise database server ( - (separate server)
      OCI (64-bit client)

      Our sqlnet.ora file contains the following:


      We read about issues with OCI in the Oracle support website and we upgraded. But the issue remains. We are at a loss as to where to look/what to do next. Any suggestions would indeed be most welcome.

      Many thanks -