start-at-task arguments

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Steven Graham

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Jul 8, 2016, 10:34:55 AM7/8/16
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I have ansible 1.9.4
Trying to understand the use of --start-at-task flag. I can start at a task by using something like "start the Cassandra instance" or if its in a role can use a | to separate the role from the task name "cassandra | start the Cassandra instance". However I have several plays in my playbook and each of those plays are actually running the same role with a few different variables or hosts groups to setup different instances of the same application. For example when I run list-tasks:

...
 play #6 (Install Cassandra App1):     TAGS: []
    create Cassandra Directories        TAGS: []
    copy and unzip DataStax     TAGS: []
    configure cassandra config file     TAGS: []
    configure cassandra-env file        TAGS: []
    configure the cassandra site and rac config file for this node      TAGS: []
    delete the existing symlink (if exists)     TAGS: []
    create the symlink  TAGS: []
    start the Cassandra instance        TAGS: []
    status of the Cassandra instance    TAGS: []
    show Cassandra status       TAGS: []

  play #7 (Install Cassandra App2):   TAGS: []
    create Cassandra Directories        TAGS: []
    copy and unzip DataStax     TAGS: []
    configure cassandra config file     TAGS: []
    configure cassandra-env file        TAGS: []
    configure the cassandra site and rac config file for this node      TAGS: []
    delete the existing symlink (if exists)     TAGS: []
    create the symlink  TAGS: []
    start the Cassandra instance        TAGS: []
    status of the Cassandra instance    TAGS: []
    show Cassandra status       TAGS: []
...

If there were to be a failure during play#7 say 'start the Cassandra instance' failed and I went and fixed the issue and wanted to restart from that point, is that possible? 
does the --start-at-task accept the format delivered by the --show-tasks option, for example: 
     --start-at-task "Install Cassandra App2 | start the Cassandra instance" or 
     --start-at-task "play #7 | start the Cassandra instance" or 
     --start-at-task "play #7 (Install Cassandra App2) | start the Cassandra instance"

Thank you
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