[AURORA-1897] Remove task length restrictions.

• Type: Task
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.19.0
• Assignee: Zameer Manji
• Reporter: Zameer Manji
• Created: 01/Mar/17 23:27
• Updated: 08/Nov/17 04:40
• Resolved: 12/Jun/17 20:16

Description

Currently we restrict the total name of a task because of a Mesos bug:

  // This number is derived from the maximum file name length limit on most UNIX systems, less
  // the number of characters we've observed being added by mesos for the executor ID, prefix, and
  // delimiters.
  @VisibleForTesting
  static final int MAX_TASK_ID_LENGTH = 255 - 90;
....
    // TODO(maximk): This is a short-term hack to stop the bleeding from
    //               https://issues.apache.org/jira/browse/MESOS-691
    if (taskIdGenerator.generate(task, totalInstances).length() > MAX_TASK_ID_LENGTH) {
      throw new TaskValidationException(
          "Task ID is too long, please shorten your role or job name.");
    }

However codyg recently asked on the mesos mailing list about MESOS-691 and learned that it is no longer valid.

We should remove this restriction.

Issue Links

• relates to: MESOS-691 Slave should not crash on failure to launch/kill executors