A licensee found the core when the program creates child process in
Runtime.exec().
The crash frequency is once a month in 24 hours run on multi processor
box.(4 CPU)

The crash(SIGABORT) occurs in "close()" called from
java/lang/UNIXprocess#forkAndExec and some message of libthread panic
is output.

We will get more details later.
The attache in below are their investigation.


INVESTIGATION:

 There seems a problem in
   j2se/src/solaris/native/java/loang/UNIXProcess_md.c.solaris
 specifically, the problem may be in the lines which try to close()
 file desciptor after fork1().
 
=== UNIXProcess_md.c.solaris 1.3.1_0X ====

   .....

    resultPid = fork1();

    .......

    if (resultPid == 0) {
        /* Child process */
        int i, max_fd;

   .......

        /* close everything */
        max_fd = sysconf(_SC_OPEN_MAX);
        for (i = 3; i < max_fd; i++) close(i); // (*1), may have problem

   ......

        execvp(cmdv[0], cmdv);

        _exit(-1);
    }



<=======

They consider the above (*1) part should be as follows.

=======>
   .....

    resultPid = fork1();

    .......

    if (resultPid == 0) {
        /* Child process */
        int i, max_fd;

   .......

        /* close everything */
        max_fd = sysconf(_SC_OPEN_MAX);

       for (i = 3; i < max_fd; i++) { // change
         int flags = fcntl(i, F_GETFD); // change
         if(flags >= 0) { // change
           flags |= FD_CLOEXEC; // change
           fcntl(i, F_SETFD, flags); // change
         } // change
       } // change

   ......

        execvp(cmdv[0], cmdv);

        _exit(-1);
    }


<=======


NOTE:
  According to their investigation, when the following occurs in libthread
  in Solaris7 106980-12 or later, the program outputs core files.
    - To fail in creating lwp because of the short of resources( ex. mem)
    - application program close(2)s fd whcih libthread open(2)
 
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