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https://issues.apache.org/jira/browse/TEZ-3857?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhiyuan Yang closed TEZ-3857.
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> Tez TaskImpl can throw Invalid state transition for leaf tasks that do Retro
> Active Transition
> ----------------------------------------------------------------------------------------------
>
> Key: TEZ-3857
> URL: https://issues.apache.org/jira/browse/TEZ-3857
> Project: Apache Tez
> Issue Type: Bug
> Reporter: Kuhu Shukla
> Assignee: Kuhu Shukla
> Fix For: 0.9.1
>
> Attachments: TEZ-3857.001.patch, TEZ-3857.002.patch,
> TEZ-3857.003.patch
>
>
> {code}
> Invalid event T_ATTEMPT_FAILED on Task task_1234_5678_1_01_000001
> {code}
> The task had more than one running attempts (because of speculative
> execution), while one of them succeeded and the task was marked succeeded,
> the second failed and caused the Task state machine to enter error state
> since the task was in a leaf vertex and does the following:
> {code}
> if (task.leafVertex) {
> LOG.error("Unexpected event for task of leaf vertex " +
> event.getType() + ", taskId: "
> + task.getTaskId());
> task.internalError(event.getType());
> }
> {code}
> This JIRA tracks fixing this invalid state.
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