I'm running search and suddenly there aren't any results neither in the Search & Report app or Hadoop connect search. I receive the error below:
reason="Search not executed: Dispatch Command: The minimum free disk space (5000MB) reached for $PATH
user=admin.", concurrencycategory="historical", concurrencycontext="userinstance-wide", currentconcurrency=0, concurrency_limit=5000
Just clear $splunk$/var/run/splunk/dispatch and that will purge a fair amount. you'll have to run "$splunk$/bin/splunk stop" and then purge to clear the whole thing
Your Splunk disk has less than 5GB of free space, which is the least Splunk requires to do a search. Free up some space on the disk and you should be able to search again. A good place to look for things to delete is the dispatch directory ($SPLUNK_HOME/var/run/splunk/dispatch). It often contains old search artifacts that were never cleaned up for one reason or another.
Limits for controlling disk space in Splunk can be changed
The relevant stanza and parameter of interest in server.conf ($SPLUNK_HOME/etc/system/local/server.conf) is:
[diskUsage] minFreeSpace = 500
For more details please look here:
Hope this helps.