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From Gavin Harcourt <>
Subject Re: Solr leaking references to deleted files
Date Tue, 31 May 2016 15:34:10 GMT
Those two bugs would make sense as we have been reloading the cores 
quite frequently recently to apply new config and schema changes. I'll 
keep an eye on the situation now our reload spree has ended and see if 
it recurs.


On 31/05/16 16:14, Erick Erickson wrote:
> Possibly:
> SOLR-9116 or SOLR-9117? Note those two require that the core be
> reloaded, so you have to be doing something a bit unusual for them to
> be the problem.
> Best,
> Erick
> On Tue, May 31, 2016 at 5:41 AM, Gavin Harcourt
> <> wrote:
>> Hi All,
>> I've noticed on some of my solr nodes that the disk usage is increasing over
>> time. After checking the output of lsof I found hundreds of references to
>> deleted index files being held by solr. This totaled 24GB on a 16GB index. A
>> restart of solr can obviously fix this but this is not an ideal solution. We
>> are running solr 5.4.0 on OpenJDK  1.8.0_91. We are using the Concurrent
>> Mark Sweep GC although I've also seen the same problem on nodes using the G1
>> GC. Our update handler has autoCommit and softAutoCommit enabled (at
>> different intervals). We are using solr cloud and have multiple shards with
>> 2 nodes each in our collections. I've not seen any pattern between this
>> appearing on leaders or replicas. Not all my nodes appear to be exhibiting
>> the problem either. Our usage pattern does involve a lot of churn in our
>> index with the majority of documents being updated/deleted every day.
>> Searching JIRA and the web in general I could only find references to this
>> sort of problem when running solr in tomcat. Can anyone suggest a reason why
>> this might be happening or a way I can manage it without needing to restart
>> solr?
>> Example lsof output:
>> java       1100      s123  DEL       REG 202,3               8919406
>> /home/s123/solr/data/uk_shard2_replica1/data/index/_3m9s.fdt
>> java       1100      s123  DEL       REG 202,3               8919159
>> /home/s123/solr/data/uk_shard2_replica1/data/index/_3mnk.tvd
>> java       1100      s123  DEL       REG 202,3               8919150
>> /home/s123/solr/data/uk_shard2_replica1/data/index/_3mnk_Lucene50_0.tim
>> java       1100      s123  DEL       REG 202,3               8919094
>> /home/s123/solr/data/uk_shard2_replica1/data/index/_3mq1_Lucene50_0.tim
>> java       1100      s123  DEL       REG 202,3               8919103
>> /home/s123/solr/data/uk_shard2_replica1/data/index/_3mq1.tvd
>> Regards,
>> Gavin.

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