No obvious way to delete persistent cluster admin settings #3670
Description
There's no delete API for these, if you want to set them back to defaults on next startup.
karmi on irc suggested setting them to the empty string, e.g.:
curl -XPUT 'localhost:9200/_cluster/settings' -d '{"persistent":{"threadpool.search.type":""}}'
But then on next restart I got warnings like this:
[2013-09-11 20:08:41,548][WARN ][node.settings ] [lo3uppaldbs009.palomino.pearson.com] failed to refresh settings for [org.elasticsearch.threadpool.ThreadPool$ApplySettings@49e3f731]
org.elasticsearch.ElasticSearchIllegalArgumentException: No type found [], for [search]
at org.elasticsearch.threadpool.ThreadPool.rebuild(ThreadPool.java:452)
at org.elasticsearch.threadpool.ThreadPool.updateSettings(ThreadPool.java:468)
at org.elasticsearch.threadpool.ThreadPool$ApplySettings.onRefreshSettings(ThreadPool.java:809)
at org.elasticsearch.node.settings.NodeSettingsService.clusterChanged(NodeSettingsService.java:84)
at org.elasticsearch.cluster.service.InternalClusterService$2.run(InternalClusterService.java:321)
at org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.run(PrioritizedEsThreadPoolExecutor.java:95)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)
So now I have no way to tell what kind of thread pool I have.
Version: 0.90.3
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