ID: 47540 Updated by: [email protected] Reported By: tstarling at wikimedia dot org -Status: Open +Status: Feedback Bug Type: CGI related Operating System: Linux PHP Version: 5.2CVS-2009-03-02 (CVS) New Comment:
Please try using this CVS snapshot: http://snaps.php.net/php5.2-latest.tar.gz For Windows: http://windows.php.net/snapshots/ I believe a similar bug has been fixed in 5.2.7. Previous Comments: ------------------------------------------------------------------------ [2009-03-02 04:01:46] tstarling at wikimedia dot org Description: ------------ sapi_cli_ub_write() is faulty and may go into a tight infinite loop under certain circumstances. If write() produces an error, it calls php_handle_aborted_connection(), but if ignore_user_abort(true) has been called, this does not exit the request. Thus it enters an infinite loop. Bug #20053 is a similar bug in a different SAPI. It's likely that many SAPIs have copied this code and suffer the same problem. Reproduce code: --------------- <?php ignore_user_abort(true); while ( true ) { fwrite( STDERR, microtime(true) . "\n" ); echo "Hello\n"; usleep(500000); } ?> Run it like this: $ php nfs-test.php > /mnt/some-nfs-mount/test-file Then while that is running, on another server: $ rm /mnt/some-nfs-mount/test-file Expected result: ---------------- It should exit when the file is removed, like it does when ignore_user_abort(true) is not called. Actual result: -------------- After a few seconds, the stderr output will stop ticking, and strace will show a flood of: write(1, "Hello\n", 6) = -1 ESTALE (Stale NFS file handle) write(1, "Hello\n", 6) = -1 ESTALE (Stale NFS file handle) write(1, "Hello\n", 6) = -1 ESTALE (Stale NFS file handle) write(1, "Hello\n", 6) = -1 ESTALE (Stale NFS file handle) write(1, "Hello\n", 6) = -1 ESTALE (Stale NFS file handle) write(1, "Hello\n", 6) = -1 ESTALE (Stale NFS file handle) ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=47540&edit=1
