Solr keeps copying ConfigSet for non-exist Collection.

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Solr keeps copying ConfigSet for non-exist Collection.

Ming Wu
Hi All,

After I restarted my Solr and Zookeeper server.  The Solr node kept copying Config Set to non existed Solr collection.

2019-12-11 08:09:25.201 INFO  (OverseerThreadFactory-9-thread-134-processing-n:10.9.57.213:8983_solr) [   ] o.a.s.c.c.ZkConfigManager Copying zk node /configs/_data/lang/stopwords_tr.txt to /configs/d957c8e74e71/lang/stopwords_tr.txt
2019-12-11 08:09:25.206 INFO  (OverseerThreadFactory-9-thread-135-processing-n:10.9.57.213:8983_solr) [   ] o.a.s.c.c.ZkConfigManager Copying zk node /configs/_data/lang/stopwords_tr.txt to /configs/726766cd4c93/lang/stopwords_tr.txt
2019-12-11 08:09:25.217 INFO  (OverseerThreadFactory-9-thread-134-processing-n:10.9.57.213:8983_solr) [   ] o.a.s.c.c.ZkConfigManager Copying zk node /configs/_data/lang/stopwords_ar.txt to /configs/d957c8e74e71/lang/stopwords_ar.txt
2019-12-11 08:09:25.217 INFO  (OverseerThreadFactory-9-thread-135-processing-n:10.9.57.213:8983_solr) [   ] o.a.s.c.c.ZkConfigManager Copying zk node /configs/_data/lang/stopwords_ar.txt to /configs/726766cd4c93/lang/stopwords_ar.txt
2019-12-11 08:09:25.225 INFO  (OverseerThreadFactory-9-thread-134-processing-n:10.9.57.213:8983_solr) [   ] o.a.s.c.c.ZkConfigManager Copying zk node /configs/_data/lang/userdict_ja.txt to /configs/d957c8e74e71/lang/userdict_ja.txt
2019-12-11 08:09:25.225 INFO  (OverseerThreadFactory-9-thread-135-processing-n:10.9.57.213:8983_solr) [   ] o.a.s.c.c.ZkConfigManager Copying zk node /configs/_data/lang/userdict_ja.txt to /configs/726766cd4c93/lang/userdict_ja.txt
2019-12-11 08:09:25.235 INFO  (OverseerThreadFactory-9-thread-134-processing-n:10.9.57.213:8983_solr) [   ] o.a.s.c.c.ZkConfigManager Copying zk node /configs/_data/lang/stopwords_eu.txt to /configs/d957c8e74e71/lang/stopwords_eu.txt

As shown in the log,  my ConfigSet template is saved in /configs/_data on Zookeeper,  when one collection is created, the template will be copied to /configs/$collectionID on Zookeeper and a Zookeeper node /collections/$collectionId will be created for the collection.  However, there is no collection ' d957c8e74e71' registered in Zookeeper, neither there is index file on Solr host.  I wonder where Solr get the collection id? and What's the logic of this behavior?  I have checked that there is no one was creating Solr collection during the same period.

Thanks,
Ming