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Bug
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Resolution: Fixed
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Minor
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Jenkins 2.73.3, OpenJDK 8_151, Ubuntu 16.04, Ubuntu 14.04.
After updating to 2.73.3 jobs now gets randomly stuck in queue and Jenkins says that it doesn't have label .. I can see that some slave nodes (containers) coming up online for a split second then disappears, but then the job(s) gets stuck forever in the queue. The problem is that I do not see anything in the Jenkins logs that's out of the ordinary.
Downgrading to 2.73.2 and recreating the config.xml (global config file) seems to fix the issue for us.
P.S.: What's even more weird is that some jobs run while others gets stuck forever (sometimes).
Other than the channel pinger, there seems to be nothing in 2.73.3 that would explain this.
Could you try upgrading again to see whether the problem reoccurs after you've reset the configuration and downgraded, or whether it was a one off issue?
Do you still have the logs from the 2.73.3 run that could indicate a specific problem by logging error messages?
CC oleg_nenashev