1 2 3 Previous Next 99 Replies Latest reply: Jul 17, 2011 2:43 PM by R C-R Branched to a new discussion.
ryanmoffett1 Level 1 Level 1 (0 points)

I installed the Security Update that was made available today.   Now, I have constant high CPU from a process called 'MRT'.   In the Console Log, I see the following:

5/31/11 8:28:26 PM    com.apple.launchd[1]    (com.apple.mrt) Throttling respawn: Will start in 1 seconds

5/31/11 8:28:36 PM    com.apple.launchd[1]    (com.apple.mrt[57302]) Exited with exit code: 4

5/31/11 8:28:36 PM    com.apple.launchd[1]    (com.apple.mrt) Throttling respawn: Will start in 1 seconds

5/31/11 8:28:46 PM    com.apple.launchd[1]    (com.apple.mrt[57306]) Exited with exit code: 4

5/31/11 8:28:46 PM    com.apple.launchd[1]    (com.apple.mrt) Throttling respawn: Will start in 2 seconds

5/31/11 8:28:56 PM    com.apple.launchd[1]    (com.apple.mrt[57308]) Exited with exit code: 4

5/31/11 8:28:56 PM    com.apple.launchd[1]    (com.apple.mrt) Throttling respawn: Will start in 3 seconds

5/31/11 8:29:06 PM    com.apple.launchd[1]    (com.apple.mrt[57314]) Exited with exit code: 4

5/31/11 8:29:06 PM    com.apple.launchd[1]    (com.apple.mrt) Throttling respawn: Will start in 3 seconds

5/31/11 8:29:19 PM    com.apple.launchd[1]    (com.apple.mrt[57315]) Exited with exit code: 4

5/31/11 8:29:19 PM    com.apple.launchd[1]    (com.apple.mrt) Throttling respawn: Will start in 1 seconds

5/31/11 8:29:28 PM    com.apple.launchd[1]    (com.apple.mrt[57323]) Exited with exit code: 4

5/31/11 8:29:28 PM    com.apple.launchd[1]    (com.apple.mrt) Throttling respawn: Will start in 3 seconds

5/31/11 8:29:38 PM    com.apple.launchd[1]    (com.apple.mrt[57327]) Exited with exit code: 4

5/31/11 8:29:38 PM    com.apple.launchd[1]    (com.apple.mrt) Throttling respawn: Will start in 3 seconds

5/31/11 8:29:50 PM    com.apple.launchd[1]    (com.apple.mrt[57329]) Exited with exit code: 4

5/31/11 8:29:50 PM    com.apple.launchd[1]    (com.apple.mrt) Throttling respawn: Will start in 2 seconds

 

For the good portion of this afternoon into this evening, I've been running at about 80%+ CPU utilization with MRT being the offender based on watching 'top' and Activity Monitor.   Anyone else seeing something similar?


MacBook Pro, Mac OS X (10.6.7)
  • 1. Re: Constant high CPU after Security Update today
    Allan Eckert Level 8 Level 8 (41,525 points)

    I have installed the Security Update and have not seen any change in CPU utilization at all.

     

    Allan

  • 2. Re: Constant high CPU after Security Update today
    kfugere Level 1 Level 1 (0 points)

    I'm seeing that as well today - ever since I ran today's security update.

  • 3. Re: Constant high CPU after Security Update today
    Aaron Longchamps Level 1 Level 1 (0 points)

    I didn't really notice when mine started, but I've had the same thing, recently, where MRT is using 10-12% of one of my cores.

  • 4. Re: Constant high CPU after Security Update today
    Linc Davis Level 10 Level 10 (118,285 points)

    Reboot, then install the update again. If you got it from Software Update, you'll have to download it manually from the Apple Support site.

  • 5. Re: Constant high CPU after Security Update today
    ryanmoffett1 Level 1 Level 1 (0 points)

    I went to the Apple Downloads page and downloaded SecUpd2011-003Snow.dmg manually and re-installed it and rebooted...saw the same constant high CPU with the MRT process respawn every 3-5 seconds, so I re-installed it yet again and rebooted.  Same thing every time.  

  • 6. Re: Constant high CPU after Security Update today
    ryanmoffett1 Level 1 Level 1 (0 points)

    Here's a tiny bit more info from system.log (in bold):

     

    May 31 22:22:29 rymoffet-mac MRT[444]: Error: SMJobRemove: The operation couldn’t be completed. (kSMErrorDomainFramework error 4 - There was an error in the Authorization subsystem.)

    May 31 22:22:30 rymoffet-mac com.apple.launchd[1] (com.apple.mrt[444]): Exited with exit code: 4

    May 31 22:22:30 rymoffet-mac com.apple.launchd[1] (com.apple.mrt): Throttling respawn: Will start in 5 seconds

    May 31 22:22:40 rymoffet-mac MRT[445]: Error: SMJobRemove: The operation couldn’t be completed. (kSMErrorDomainFramework error 4 - There was an error in the Authorization subsystem.)

    May 31 22:22:41 rymoffet-mac com.apple.launchd[1] (com.apple.mrt[445]): Exited with exit code: 4

    May 31 22:22:41 rymoffet-mac com.apple.launchd[1] (com.apple.mrt): Throttling respawn: Will start in 5 seconds

    May 31 22:22:51 rymoffet-mac MRT[446]: Error: SMJobRemove: The operation couldn’t be completed. (kSMErrorDomainFramework error 4 - There was an error in the Authorization subsystem.)

    May 31 22:22:51 rymoffet-mac com.apple.launchd[1] (com.apple.mrt[446]): Exited with exit code: 4

    May 31 22:22:51 rymoffet-mac com.apple.launchd[1] (com.apple.mrt): Throttling respawn: Will start in 5 seconds

     

    I have run a full repair on disk permissions but it hasn't resolved this issue.   SMJobRemove seems to be an SDK function for removing a job from the Service Manager based on a simple search I did.   However, I can't see what would be causing this particular error.   Everything else was working fine (and still is, except this MRT problem that started today).

  • 7. Re: Constant high CPU after Security Update today
    Linc Davis Level 10 Level 10 (118,285 points)

    You have some sort of system corruption. Back up all your data, then boot from your installation DVD and reinstall. After rebooting, run Software Update.

  • 8. Re: Constant high CPU after Security Update today
    jayfromraleigh Level 1 Level 1 (0 points)

    Not sure about system corruption and the need for a complete re-install... but I have the same issue and errors showing up in system.log.

  • 9. Re: Constant high CPU after Security Update today
    dahtah Level 1 Level 1 (0 points)

    Hi,

    I had the same issue. I removed the 2 launchd plist files used to start mrt:

     

    rm /System/Library/LaunchDaemons/com.apple.mrt.plist

    rm /System/Library/LaunchAgents/com.apple.mrt.uiagent.plist

     

    I then rebooted, and cpu is back to normal. Mrt is not launched on stratup.

    It is ridiculous that Apple releases a security update without testing it.

     

    Cheers,

    Alex

  • 10. Re: Constant high CPU after Security Update today
    R C-R Level 6 Level 6 (14,175 points)

    Updates are tested before release. If you are having problems after applying one, chances are very high that they are due to an unnoticed preexisting problem on your system like file corruption. This is why the advice to reinstall the OS is given so often in this situation.

     

    If you have removed the files that launch any part of the anti-malware features of the update, you are not protected.

  • 11. Re: Constant high CPU after Security Update today
    jayfromraleigh Level 1 Level 1 (0 points)

    Understand about the protection, but my system was close to unusable without preventing MRT from starting... I'll keep looking for an updated patch from Apple to address this and take my chances...

     

    Thanks Alex for the suggestion... worked as advertised...

  • 12. Re: Constant high CPU after Security Update today
    R C-R Level 6 Level 6 (14,175 points)

    Apple won't issue a patch for a problem caused by file corruption in your system. If that is the source of your problems, it will only get worse & the next update will most likely cause you still more problems.

  • 13. Re: Constant high CPU after Security Update today
    Barry Hemphill Level 7 Level 7 (34,500 points)

    Hello all:

     

    Just for information, I installed the subject software update this morning (using software update).  No change in CPU utilization.

     

    I am not suggesting that others have not had problems, but when a thread like this is started, I believe perspective is important.

     

    Barry

  • 14. Re: Constant high CPU after Security Update today
    thomas_r. Level 7 Level 7 (27,960 points)

    Not sure about system corruption and the need for a complete re-install...

     

    Note that Linc was not recommending a complete reinstall as most people understand it.  The Snow Leopard installer will allow you to install directly on top of an existing system, replacing files with new copies.  Install, update everything again and you'll be right back where you are fairly quickly, but with fresh copies of all system files.  Of course, it should go without saying that you should have good backups before trying this, in case something goes wrong... but many people don't do that so it does need to be said.

     

    This sort of problem occurs for some people with each and every update, and invariably there will be the same old tired and ridiculous statements about how Apple should test the updates, blah, blah, blah.  It's important to understand that it is actually very rare that serious bugs make it into an update.  Most reported problems like this are caused by underlying issues on a system that become big issues when large numbers of files are modified by an update.  It's just like a house that may have undetected structural defects that are not discovered until a second floor addition is added, causing the house to collapse...  it wasn't the addition, per se, that caused the collapse.

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