Zhitao Li created MESOS-7852:
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Summary: Tighten error handling in slaveRunTaskLabelDecorator hook
Key: MESOS-7852
URL: https://issues.apache.org/jira/browse/MESOS-7852
Project: Mesos
Issue Type: Bug
Components: modules
Reporter: Zhitao Li
For whatever reason, the {{slaveRunTaskLabelDecorator}} allows the module
author to return an error, but the hook manager "silently" suppresses the error
in {{HookManager::slaveRunTaskLabelDecorator}} and proceed.
This creates some problems:
1) module author could incorrectly assume that an returned error could cause
the task run to fail, but it's actually not the case;
2) module author has not way to instruct Mesos agent to stop the task launch if
unrecoverable error happens.
I suggest we tighten the handling here to fail the task run if module reports
an error. A module can still work around soft errors by just returning input
labels as-is.
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