Topology script should have some kind of timeout
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Key: HADOOP-7149
URL: https://issues.apache.org/jira/browse/HADOOP-7149
Project: Hadoop Common
Issue Type: Improvement
Affects Versions: 0.23.0
Reporter: Todd Lipcon
We've seen an issue where a custom topology script was hanging for some
external reason. This caused the NN to block during startup without any kind of
clear indication what was going on.
We should consider adding a timeout for the topology script execution, or at
least a timer which triggers WARN or ERROR level messages if it takes longer
than a few seconds.
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