[jira] [Created] (AMBARI-2325) Agent remains in Queued status and then times out

["Sumit Mohanty (JIRA)" <ji...@apache.org>]

Sumit Mohanty created AMBARI-2325:
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             Summary: Agent remains in Queued status and then times out
                 Key: AMBARI-2325
                 URL: https://issues.apache.org/jira/browse/AMBARI-2325
             Project: Ambari
          Issue Type: Bug
          Components: controller
    Affects Versions: 1.2.4
            Reporter: Sumit Mohanty
            Assignee: Sumit Mohanty
             Fix For: 1.2.5


The issues seems to be as follows:
Request A times out because some task (host-role-command) ran for more than 20 minutes. After 20 minutes BE times-out the task. However, agent fails to timeout or kill the task so it continues to wait till the task is completed.

Meanwhile, server gets another request and schedules a set of tasks on the host. The tasks get scheduled (QUEUED) at the agent but the agent does not pick up the tasks for execution (it never goes to IN_PROGRESS). If the task stays long enough in Queued then eventually BE will time it out. So the tasks can go from QUEUED to TIMED_OUT.

The agent has a bug where if attempt to send SIGTERM throws an exception, then it never send SIGKILL thus will end up waiting till the process (created due to task execution) is completed.

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