Bikas Saha created TEZ-1075:
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Summary: 0 vertex dags should succeed
Key: TEZ-1075
URL: https://issues.apache.org/jira/browse/TEZ-1075
Project: Apache Tez
Issue Type: Bug
Reporter: Bikas Saha
Currently 0 vertex dags fail because of the following code in DAGImpl
{code} if (numVertices == 0) {
addDiagnostic("No vertices for dag");
trySetTerminationCause(DAGTerminationCause.ZERO_VERTICES);
if (event != null) {
return DAGState.FAILED;
}
return finished(DAGState.FAILED);
}
{code}
IMO a 0 vertex DAG is a legitimate construct and should just pass. Similar to a
0 task vertex. Its essentially a no-op operation.
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