Andrew Grande created NIFI-2001:
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Summary: Introduce a 'safe' startup mode
Key: NIFI-2001
URL: https://issues.apache.org/jira/browse/NIFI-2001
Project: Apache NiFi
Issue Type: Improvement
Affects Versions: 0.6.1
Reporter: Andrew Grande
*Driver*: after NiFi crashes (e.g. with OOME), one needs to go in and manually
flush queues or partially enable/disable flows to let them run and drain data.
Also, if, for some reason, NiFi was sent into a CPU or I/O death spiral by the
flow (e.g. a design mistake, or an unexpected spike in the data without
backpressure controls configured).
Today it's not possible without directly hacking the flow.xml.gz. This becomes
even more troublesome in a clustered environment.
*Proposal*: add a 'safe' switch/mode to NiFi, which will let it start up with
full UI and infrastructure controls, but explicitly stopping all flows and CS.
E.g. invoking *nifi.sh start -safe* on command line.
Internally, the following should happen:
* NiFi starts up as normal, with all libraries, plugins, etc.
* However, *none* of the processorts, CS & groups are started/enabled
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