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From Andrew Kettmann <>
Subject Solr 7.7.2 - SolrCloud - SPLITSHARD - Using LINK method fails on disk usage checks
Date Tue, 18 Jun 2019 16:32:43 GMT
Using Solr 7.7.2 Docker image, testing some of the new autoscale features, huge fan so far.
Tested with the link method on a 2GB core and found that it took less than 1MB of additional
space. Filled the core quite a bit larger, 12GB of a 20GB PVC, and now splitting the shard
fails with the following error message on my overseer:

2019-06-18 16:27:41.754 ERROR (OverseerThreadFactory-49-thread-5-processing-n:
[c:test_autoscale s:shard1  ] o.a.s.c.a.c.OverseerCollectionMessageHandler Collection: test_autoscale
operation: splitshard failed:org.apache.solr.common.SolrException: not enough free disk space
to perform index split on node, required: 23.35038321465254, available:
    at org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$0(
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(
    at java.base/java.util.concurrent.ThreadPoolExecutor$
    at java.base/

I attempted sending the request to the node itself to see if it did anything different, but
no luck. My parameters are (Note Python formatting as that is my language of choice):

splitparams = {'action':'SPLITSHARD',

And this is confirmed by the log message from the node itself:

2019-06-18 16:27:41.730 INFO  (qtp1107530534-16) [c:test_autoscale   ] o.a.s.s.HttpSolrCall
[admin] webapp=null path=/admin/collections params={async=shardsplitasync&timing=true&action=SPLITSHARD&collection=test_autoscale&shard=shard1&splitMethod=link}
status=0 QTime=20

While it is true I do not have enough space if I were using the rewrite method, the link method
on a 2GB core used an additional less than 1MB of space. Is there something I am missing here?
is there an option to disable the disk space check that I need to pass? I can't find anything
in the documentation at this point.

Andrew Kettmann
DevOps Engineer
P: 1.314.596.2836
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