sqlplus uptime过久事件

In this Document
  Symptoms
  Changes
  Cause
  Solution
  References

Applies to:

Symptoms

Trying to invoke SQL*Plus hangs when machine uptime has been for a long period of time.  There have been cases where problem occurs when uptime reaches 60 days and others as long as 248 days.

Database connection is not relevant as the 'sqlplus' executable itself hangs with or without connection information. It hangs regardless of what parameters are passed in.  For example:

   sqlplus -V

However, the hang does not reproduce with Instant Client version 10.1.0.4

Generating a stack trace using gdb debugger shows:

#0 0x0048a0dd in times () from /lib/tls/libc.so.6
#1 0x01884599 in sltrgatime64 () from ./libclntsh.so.10.1
#2 0x0137d70f in kghinp () from ./libclntsh.so.10.1
#3 0x00f86b47 in kpuinit0 () from ./libclntsh.so.10.1
#4 0x00f85e7a in kpuenvcr () from ./libclntsh.so.10.1
#5 0x01051b5e in OCIEnvCreate () from ./libclntsh.so.10.1
#6 0x0099787e in afidrv () from ./libsqlplus.so
#7 0x009702b9 in safimTerminate () from ./libsqlplus.so
#8 0x0098c246 in afidrv () from ./libsqlplus.so
#9 0x080486f6 in main ()

Running STRACE tool shows:

$ strace /oracle/home/bin/sqlplus -V 2>&1 |less
......
old_mmap(NULL, 385024, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x41794000
gettimeofday({1122996561, 411035}, NULL) = 0
access("/usr/local/UD/conf/sqlnet.ora", F_OK) = -1 ENOENT (No such file or directory)
access("/usr/local/UD/lib/oracle/network/admin/sqlnet.ora", F_OK) = -1 ENOENT (No such file or directory)
access("/usr/local/UD/conf/sqlnet.ora", F_OK) = -1 ENOENT (No such file or directory)
access("/usr/local/UD/lib/oracle/network/admin/sqlnet.ora", F_OK) = -1 ENOENT (No such file or directory)
fcntl64(-1218313656, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
times(NULL) = -1825782405
times(NULL) = -1825782405
times(NULL) = -1825782405
times(NULL) = -1825782405
times(NULL) = -1825782405
times(NULL) = -1825782405
times(NULL) = -1825782405

It is looping on the times() function.

In addition to sqlplus, it has been reported that the netca and dbca tools also hang.

Changes

Cause

This is a known, unpublished bug.

Bug 4612267 OCI CLIENT IS IN AN INFINITE LOOP WHEN MACHINE UPTIME HITS 248 DAYS

Solution

Select one of the following two solutions:

1) Apply one-off patch available for 10.2.0.1.
   a. Download one-off patch off Metalink:
       Patch 4612267
       Description OCI CLIENT IS IN AN INFINITE LOOP WHEN MACHINE UPTIME HITS 248 DAYS
       Product CORE
       Release Oracle 10.2.0.1

   b. To apply patch on Instant Client install, please follow instructions documented in the OCI manual.
        You can find this in:
        http://www.oracle.com/pls/db102/db102.show_toc?which=main&partno=b14250&maxlevel=2

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