PQ50644: VERY LARGE CEEDUMP WAS TAKEN WHICH DISTURBS ONLINE PROCESSING | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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![]() APAR status Closed as program error. Error description Customer got 4,051,919 lines of CEEDUMP from one exception in a servlet in IMWEBSRV. It was way too large. Taking such a huge CEEDUMP degraded the performance of webserver terribly. From CEEDUMP, csnap was called from RasSignalHandler2.Local fix Problem summary **************************************************************** * USERS AFFECTED: All users of WebSphere Application Server * * V4.0 for z/OS and OS/390. * **************************************************************** * PROBLEM DESCRIPTION: Certain CEEDUMPs produce excessive * * amounts of data. * **************************************************************** * RECOMMENDATION: * **************************************************************** A CEEDUMP that is taken when an exception occurs is too large. csnap is the default action taken by the WebSphere signal handler in this case. The CEEDUMP is consuming too many resources, 4M for a CEEDUMP much of which is a storage dump which is not helpful to the customer for debugging application problems.Problem conclusion To address the reported problem of certain WebSphere CEEDUMPs producing excessive amounts of data, two new environment variables have been introduced. The first environment variable, BBODUMP, indicates the type of dump to be taken. The second environment variable, BBODUMP_CEE3DMP_OPTIONS, controls the options to be passed to CEE3DMP so the options can be tailored by the customer. The documention changes for these new environment variables follows: NOTE: Periodically, we refresh the documentation on our Web site, so the changes might have been made before you read this text. To access the latest on-line documentation, go to the product library page at: www.ibm.com/software/webservers/appserv/ Document Name: WebSphere Application Server V4.0 for z/OS and OS/390: Installation and Customization Document Number: GA22-7834-01 In "Appendix A. Environment files," add the following environment variable descriptions: BBODUMP=n Specifies the default dump used by the signal handler. Valid values and their meanings are: 0 No dump is generated. 1 A ctrace dump is taken. 2 A cdump dump is taken. 3 A csnap dump is taken. 4 A CEE3DMP dump is taken. CEE3DMP generates a dump of Language Environment and the member language libraries. Sections of the dump are selectively included, depending on dump options specified, either by default or through the BBODUMP_CEE3DMP_OPTIONS environment variable. By default, this value passes THREAD(ALL) BLOCKS to CEE3DMP. You can override the default options for CEE3DMP through the BBODUMP_CEE3DMP_OPTIONS environment variable. For more information about CEE3DMP and its options, see z/OS Language Environment Programming Reference, SA22-7562. If you do not specify BBODUMP, the default value is 3 (a csnap dump is taken). EXAMPLE: BBODUMP=3 BBODUMP_CEE3DMP_OPTIONS=options Specifies dump options to be used with a CEE3DMP. This environment variable is used when you specify BBODUMP=4. For an explanation of CEE3DMP and valid dump options, see z/OS Language Environment Programming Reference, SA22-7562. RULE: The maximum length of the option string on this environment variable is 255. If the option string is longer than 255, you receive message BBOU0514W and the CEE3DMP dump options are set to THREAD(ALL) BLOCKS. EXAMPLE: BBODUMP_CEE3DMP_OPTIONS=NOTRACEBACK NOFILES Document Name: WebSphere Application Server V4.0 for z/OS and OS/390: Messages and Diagnosis Document Number: GA22-7837-01 In Chapter 12, pg. 289 add a new message. BBOU0738E CEE3DMP FAILED WITH MESSAGE NUMBER: %d EXPLANATION: Signal handler invoked CEE3DMP, which failed. USER RESPONSE: See CEE3DMP documentation for a description of the message number. Most of the time an invalid option was specified on the BBODUMP_CEE3DMP_OPTIONS environment variable. APAR PQ50644 is associated with SERVICE LEVEL W400037 of WebSphere Application Server V4.0 for z/OS and OS/390.Temporary fix Comments
APAR is sysrouted FROM one or more of the following: APAR is sysrouted TO one or more of the following: UQ57726 Modules/Macros
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Document Information |
Product categories: Software > Application Servers >
Distributed Application & Web Servers > WebSphere Application
Server for z/OS
Operating system(s):
Software version: 400
Software edition:
Reference #: PQ50644
IBM Group: Software Group
Modified date: Oct 3, 2001
(C) Copyright IBM Corporation 2000, 2006. All Rights Reserved.