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Status Future consideration
Created by Guest
Created on Sep 25, 2013

Create AMQERR01.LOG message or generate event at circular error log switch on WMQ distributed

Create a message in AMQERR01.LOG or generate an event when the circular error log 'flips' to the next file (via rename): AMQERR01->AMQERR02 , AMQERR02->AMQERR03, AMQERR03->AMQERR01

Idea priority Medium
RFE ID 39587
RFE URL
RFE Product IBM MQ
  • Guest
    Reply
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    Oct 15, 2015

    Due to processing by IBM, this request was reassigned to have the following updated attributes:
    Brand - WebSphere
    Product family - Integration
    Product - IBM MQ

    For recording keeping, the previous attributes were:
    Brand - WebSphere
    Product family - Connectivity and Integration
    Product - IBM MQ

  • Guest
    Reply
    |
    Jul 4, 2015

    This has long been a topic of interest at the customers where I've done MQ security consulting. The array of elaborate schemes implemented in code to capture these files as they roll is incredibly diverse.

    The biggest issue is that the rollover interval is not predictable and may be artificially reduced in an attack. To address this, IBM might provide a primary/secondary extent set similar to transaction logs and an availability interval.

    For example, the admin specifies 10 secondary extents and an availability interval of 65 minutes. If at any point log activity would roll AMQERR03.LOG before it was 65 minutes old, it rolls to secondary extents. This continues until either secondary extents are exhausted (which generates an event) or the hour expires. Meanwhile, the log archiving job runs hourly and the administrator can be confident that *all* the logs were retrieved.

  • Guest
    Reply
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    Jul 1, 2015

    We are considering modifications to MQ's error logging for a future release. While we may not do exactly as suggested here, we would hope to make it easier to monitor error messages.

  • Guest
    Reply
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    Feb 7, 2014

    Development -
    Utilizing syslog() or a platform-specific equivalent would be acceptable for this process. We are trying to develop a process by which we could 'archive' the AMQERR0x.LOG files as they are 'rolled', but before they are overwritten. Today, we have made the files very large, to help us w/ problem determination and for historical purposes. Having a means to archive these logs (similar to z/OS) would be very helpful.

  • Guest
    Reply
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    Jan 10, 2014

    This came back into our system with no additional info provided

  • Guest
    Reply
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    Oct 2, 2013

    How would you expect to monitor for the changes in the error logs? Remember that the queue manager is not necessarily running fully at the time of writing to these files, so anything that involves writing real MQ event messages cannot be reliable. Similarly, it cannot be running any background daemon to process the files. And writing something like an error message to the log files will only useful if there is a monitor permanently reading from the log, and then resetting to the top of the file when such a message appeared. Alternatives might involve syslog() or a platform-specific equivalent.

  • Guest
    Reply
    |
    Oct 2, 2013

    How would you expect to monitor for the changes in the error logs? Remember that the queue manager is not necessarily running fully at the time of writing to these files, so anything that involves writing real MQ event messages cannot be reliable. Similarly, it cannot be running any background daemon to process the files. And writing something like an error message to the log files will only useful if there is a monitor permanently reading from the log, and then resetting to the top of the file when such a message appeared. Alternatives might involve syslog() or a platform-specific equivalent.