# Unable to delete indexes - "failed to process cluster event (acquire index lock) within 30s"
**URL:** https://discuss.elastic.co/t/unable-to-delete-indexes-failed-to-process-cluster-event-acquire-index-lock-within-30s/16899
**Category:** Elasticsearch
**Created:** [April 9, 2014, 2:10pm UTC](https://discuss.elastic.co/t/unable-to-delete-indexes-failed-to-process-cluster-event-acquire-index-lock-within-30s/16899 "2014-04-09T14:10:25Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@Zachary\_Lammers](https://discuss.elastic.co/u/Zachary_Lammers)
#### Post date: [April 9, 2014, 2:10pm UTC](https://discuss.elastic.co/t/unable-to-delete-indexes-failed-to-process-cluster-event-acquire-index-lock-within-30s/16899/1 "2014-04-09T14:10:25Z")
I am unable to delete certain indexes in my cluster - using it for logging,
new indexes per day:
curl -XDELETE [http://172.16.1.100:9200/2014\_03\_27](http://172.16.1.100:9200/2014_03_27)
{"error":"ProcessClusterEventTimeoutException[failed to process cluster
event (acquire index lock) within 30s]","status":503}
curl -XDELETE [http://172.16.1.100:9200/2014\_04\_01](http://172.16.1.100:9200/2014_04_01)
{"ok":true,"acknowledged":true}
curl -XDELETE [http://172.16.1.100:9200/2014\_03\_28](http://172.16.1.100:9200/2014_03_28)
{"error":"ProcessClusterEventTimeoutException[failed to process cluster
event (acquire index lock) within 30s]","status":503}
curl -XDELETE [http://172.16.1.100:9200/2014\_04\_02](http://172.16.1.100:9200/2014_04_02)
{"ok":true,"acknowledged":true}
curl -XDELETE [http://172.16.1.100:9200/2014\_04\_03](http://172.16.1.100:9200/2014_04_03)
{"ok":true,"acknowledged":true}
However, I could deleted my 2014\_04\_01 and \_02/\_03 index just fine. Here
are logs (showing two errors above and successful delete of 2014\_04\_01/2/3):
[2014-04-09 13:56:56,323][DEBUG][action.admin.indices.delete] [bAggregator00
] [2014\_03\_27] failed to delete index
org.elasticsearch.cluster.metadata.ProcessClusterEventTimeoutException:failed to process cluster
event (acquire index lock) within 30s
at org.elasticsearch.cluster.metadata.MetaDataDeleteIndexService$1.
run(MetaDataDeleteIndexService.java:88)
at java.util.concurrent.ThreadPoolExecutor.runWorker(
ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(
ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
[2014-04-09 13:59:21,140][INFO][cluster.metadata] [bAggregator00]
[2014\_04\_01] deleting index
[2014-04-09 14:00:29,773][DEBUG][action.admin.indices.delete] [bAggregator00
] [2014\_03\_28] failed to delete index
org.elasticsearch.cluster.metadata.ProcessClusterEventTimeoutException:failed to process cluster
event (acquire index lock) within 30s
at org.elasticsearch.cluster.metadata.MetaDataDeleteIndexService$1.
run(MetaDataDeleteIndexService.java:88)
at java.util.concurrent.ThreadPoolExecutor.runWorker(
ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(
ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
[2014-04-09 14:03:29,350][INFO][cluster.metadata] [bAggregator00]
[2014\_04\_02] deleting index
[2014-04-09 14:05:03,164][INFO][cluster.metadata] [bAggregator00]
[2014\_04\_03] deleting index
Any ideas/help would be appreciated, thanks!
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### Author:  [@nicktgr15](https://discuss.elastic.co/u/nicktgr15)
#### Post date: [April 16, 2014, 4:58pm UTC](https://discuss.elastic.co/t/unable-to-delete-indexes-failed-to-process-cluster-event-acquire-index-lock-within-30s/16899/2 "2014-04-16T16:58:39Z")
Similar error
[2014-04-16 16:57:08,464][DEBUG][action.admin.indices.create] [Jerry Jaxon]
[myindex-2014.04.16] failed to create
org.elasticsearch.cluster.metadata.ProcessClusterEventTimeoutException:
failed to process cluster event (acquire index lock) within 30s
at
org.elasticsearch.cluster.metadata.MetaDataCreateIndexService$1.run(MetaDataCreateIndexService.java:141)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
On Wednesday, April 9, 2014 3:10:25 PM UTC+1, Zachary Lammers wrote:
> I am unable to delete certain indexes in my cluster - using it for
> logging, new indexes per day:
>
> curl -XDELETE [http://172.16.1.100:9200/2014\_03\_27](http://172.16.1.100:9200/2014_03_27)
> {"error":"ProcessClusterEventTimeoutException[failed to process cluster
> event (acquire index lock) within 30s]","status":503}
>
> curl -XDELETE [http://172.16.1.100:9200/2014\_04\_01](http://172.16.1.100:9200/2014_04_01)
> {"ok":true,"acknowledged":true}
>
> curl -XDELETE [http://172.16.1.100:9200/2014\_03\_28](http://172.16.1.100:9200/2014_03_28)
> {"error":"ProcessClusterEventTimeoutException[failed to process cluster
> event (acquire index lock) within 30s]","status":503}
>
> curl -XDELETE [http://172.16.1.100:9200/2014\_04\_02](http://172.16.1.100:9200/2014_04_02)
> {"ok":true,"acknowledged":true}
>
> curl -XDELETE [http://172.16.1.100:9200/2014\_04\_03](http://172.16.1.100:9200/2014_04_03)
> {"ok":true,"acknowledged":true}
>
> However, I could deleted my 2014\_04\_01 and \_02/\_03 index just fine. Here
> are logs (showing two errors above and successful delete of 2014\_04\_01/2/3):
>
> [2014-04-09 13:56:56,323][DEBUG][action.admin.indices.delete] [
> bAggregator00] [2014\_03\_27] failed to delete index
> org.elasticsearch.cluster.metadata.ProcessClusterEventTimeoutException:failed to process cluster
> event (acquire index lock) within 30s
> at org.elasticsearch.cluster.metadata.MetaDataDeleteIndexService$1
> .run(MetaDataDeleteIndexService.java:88)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(
> ThreadPoolExecutor.java:1145)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(
> ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:744)
> [2014-04-09 13:59:21,140][INFO][cluster.metadata] [bAggregator00
> ] [2014\_04\_01] deleting index
> [2014-04-09 14:00:29,773][DEBUG][action.admin.indices.delete] [
> bAggregator00] [2014\_03\_28] failed to delete index
> org.elasticsearch.cluster.metadata.ProcessClusterEventTimeoutException:failed to process cluster
> event (acquire index lock) within 30s
> at org.elasticsearch.cluster.metadata.MetaDataDeleteIndexService$1
> .run(MetaDataDeleteIndexService.java:88)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(
> ThreadPoolExecutor.java:1145)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(
> ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:744)
> [2014-04-09 14:03:29,350][INFO][cluster.metadata] [bAggregator00
> ] [2014\_04\_02] deleting index
> [2014-04-09 14:05:03,164][INFO][cluster.metadata] [bAggregator00
> ] [2014\_04\_03] deleting index
>
> Any ideas/help would be appreciated, thanks!
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### Author:  [@Rafi\_Aroch](https://discuss.elastic.co/u/Rafi_Aroch)
#### Post date: [June 3, 2014, 8:10am UTC](https://discuss.elastic.co/t/unable-to-delete-indexes-failed-to-process-cluster-event-acquire-index-lock-within-30s/16899/3 "2014-06-03T08:10:14Z")
Hi,
I'm also seeing the same issue as described. Does anyone know what may be
causing this?
Would appreciate your assistance.
Rafi
On Wednesday, April 16, 2014 7:58:39 PM UTC+3, nicktgr15 wrote:
> Similar error
>
> [2014-04-16 16:57:08,464][DEBUG][action.admin.indices.create] [Jerry
> Jaxon] [myindex-2014.04.16] failed to create
> org.elasticsearch.cluster.metadata.ProcessClusterEventTimeoutException:
> failed to process cluster event (acquire index lock) within 30s
> at
> org.elasticsearch.cluster.metadata.MetaDataCreateIndexService$1.run(MetaDataCreateIndexService.java:141)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:744)
>
> On Wednesday, April 9, 2014 3:10:25 PM UTC+1, Zachary Lammers wrote:
>
> > I am unable to delete certain indexes in my cluster - using it for
> > logging, new indexes per day:
> >
> > curl -XDELETE [http://172.16.1.100:9200/2014\_03\_27](http://172.16.1.100:9200/2014_03_27)
> > {"error":"ProcessClusterEventTimeoutException[failed to process cluster
> > event (acquire index lock) within 30s]","status":503}
> >
> > curl -XDELETE [http://172.16.1.100:9200/2014\_04\_01](http://172.16.1.100:9200/2014_04_01)
> > {"ok":true,"acknowledged":true}
> >
> > curl -XDELETE [http://172.16.1.100:9200/2014\_03\_28](http://172.16.1.100:9200/2014_03_28)
> > {"error":"ProcessClusterEventTimeoutException[failed to process cluster
> > event (acquire index lock) within 30s]","status":503}
> >
> > curl -XDELETE [http://172.16.1.100:9200/2014\_04\_02](http://172.16.1.100:9200/2014_04_02)
> > {"ok":true,"acknowledged":true}
> >
> > curl -XDELETE [http://172.16.1.100:9200/2014\_04\_03](http://172.16.1.100:9200/2014_04_03)
> > {"ok":true,"acknowledged":true}
> >
> > However, I could deleted my 2014\_04\_01 and \_02/\_03 index just fine. Here
> > are logs (showing two errors above and successful delete of 2014\_04\_01/2/3):
> >
> > [2014-04-09 13:56:56,323][DEBUG][action.admin.indices.delete] [
> > bAggregator00] [2014\_03\_27] failed to delete index
> > org.elasticsearch.cluster.metadata.ProcessClusterEventTimeoutException:
> > failed to process cluster event (acquire index lock) within 30s
> > at org.elasticsearch.cluster.metadata.
> > MetaDataDeleteIndexService$1.run(MetaDataDeleteIndexService.java:88)
> > at java.util.concurrent.ThreadPoolExecutor.runWorker(
> > ThreadPoolExecutor.java:1145)
> > at java.util.concurrent.ThreadPoolExecutor$Worker.run(
> > ThreadPoolExecutor.java:615)
> > at java.lang.Thread.run(Thread.java:744)
> > [2014-04-09 13:59:21,140][INFO][cluster.metadata] [
> > bAggregator00] [2014\_04\_01] deleting index
> > [2014-04-09 14:00:29,773][DEBUG][action.admin.indices.delete] [
> > bAggregator00] [2014\_03\_28] failed to delete index
> > org.elasticsearch.cluster.metadata.ProcessClusterEventTimeoutException:
> > failed to process cluster event (acquire index lock) within 30s
> > at org.elasticsearch.cluster.metadata.
> > MetaDataDeleteIndexService$1.run(MetaDataDeleteIndexService.java:88)
> > at java.util.concurrent.ThreadPoolExecutor.runWorker(
> > ThreadPoolExecutor.java:1145)
> > at java.util.concurrent.ThreadPoolExecutor$Worker.run(
> > ThreadPoolExecutor.java:615)
> > at java.lang.Thread.run(Thread.java:744)
> > [2014-04-09 14:03:29,350][INFO][cluster.metadata] [
> > bAggregator00] [2014\_04\_02] deleting index
> > [2014-04-09 14:05:03,164][INFO][cluster.metadata] [
> > bAggregator00] [2014\_04\_03] deleting index
> >
> > Any ideas/help would be appreciated, thanks!
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### Author:  [@Nikhil\_Mulley](https://discuss.elastic.co/u/Nikhil_Mulley)
#### Post date: [July 14, 2014, 10:08pm UTC](https://discuss.elastic.co/t/unable-to-delete-indexes-failed-to-process-cluster-event-acquire-index-lock-within-30s/16899/4 "2014-07-14T22:08:54Z")
Hi,
I am facing similar exceptions with elasticsearch 0.90. Wondering if there
was any follow up on this in the community.
thanks,
Nikhil
On Wednesday, April 16, 2014 9:58:39 AM UTC-7, nicktgr15 wrote:
> Similar error
>
> [2014-04-16 16:57:08,464][DEBUG][action.admin.indices.create] [Jerry
> Jaxon] [myindex-2014.04.16] failed to create
> org.elasticsearch.cluster.metadata.ProcessClusterEventTimeoutException:
> failed to process cluster event (acquire index lock) within 30s
> at
> org.elasticsearch.cluster.metadata.MetaDataCreateIndexService$1.run(MetaDataCreateIndexService.java:141)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:744)
>
> On Wednesday, April 9, 2014 3:10:25 PM UTC+1, Zachary Lammers wrote:
>
> > I am unable to delete certain indexes in my cluster - using it for
> > logging, new indexes per day:
> >
> > curl -XDELETE [http://172.16.1.100:9200/2014\_03\_27](http://172.16.1.100:9200/2014_03_27)
> > {"error":"ProcessClusterEventTimeoutException[failed to process cluster
> > event (acquire index lock) within 30s]","status":503}
> >
> > curl -XDELETE [http://172.16.1.100:9200/2014\_04\_01](http://172.16.1.100:9200/2014_04_01)
> > {"ok":true,"acknowledged":true}
> >
> > curl -XDELETE [http://172.16.1.100:9200/2014\_03\_28](http://172.16.1.100:9200/2014_03_28)
> > {"error":"ProcessClusterEventTimeoutException[failed to process cluster
> > event (acquire index lock) within 30s]","status":503}
> >
> > curl -XDELETE [http://172.16.1.100:9200/2014\_04\_02](http://172.16.1.100:9200/2014_04_02)
> > {"ok":true,"acknowledged":true}
> >
> > curl -XDELETE [http://172.16.1.100:9200/2014\_04\_03](http://172.16.1.100:9200/2014_04_03)
> > {"ok":true,"acknowledged":true}
> >
> > However, I could deleted my 2014\_04\_01 and \_02/\_03 index just fine. Here
> > are logs (showing two errors above and successful delete of 2014\_04\_01/2/3):
> >
> > [2014-04-09 13:56:56,323][DEBUG][action.admin.indices.delete] [
> > bAggregator00] [2014\_03\_27] failed to delete index
> > org.elasticsearch.cluster.metadata.ProcessClusterEventTimeoutException:
> > failed to process cluster event (acquire index lock) within 30s
> > at org.elasticsearch.cluster.metadata.
> > MetaDataDeleteIndexService$1.run(MetaDataDeleteIndexService.java:88)
> > at java.util.concurrent.ThreadPoolExecutor.runWorker(
> > ThreadPoolExecutor.java:1145)
> > at java.util.concurrent.ThreadPoolExecutor$Worker.run(
> > ThreadPoolExecutor.java:615)
> > at java.lang.Thread.run(Thread.java:744)
> > [2014-04-09 13:59:21,140][INFO][cluster.metadata] [
> > bAggregator00] [2014\_04\_01] deleting index
> > [2014-04-09 14:00:29,773][DEBUG][action.admin.indices.delete] [
> > bAggregator00] [2014\_03\_28] failed to delete index
> > org.elasticsearch.cluster.metadata.ProcessClusterEventTimeoutException:
> > failed to process cluster event (acquire index lock) within 30s
> > at org.elasticsearch.cluster.metadata.
> > MetaDataDeleteIndexService$1.run(MetaDataDeleteIndexService.java:88)
> > at java.util.concurrent.ThreadPoolExecutor.runWorker(
> > ThreadPoolExecutor.java:1145)
> > at java.util.concurrent.ThreadPoolExecutor$Worker.run(
> > ThreadPoolExecutor.java:615)
> > at java.lang.Thread.run(Thread.java:744)
> > [2014-04-09 14:03:29,350][INFO][cluster.metadata] [
> > bAggregator00] [2014\_04\_02] deleting index
> > [2014-04-09 14:05:03,164][INFO][cluster.metadata] [
> > bAggregator00] [2014\_04\_03] deleting index
> >
> > Any ideas/help would be appreciated, thanks!
--
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---
### Author:  [@dany](https://discuss.elastic.co/u/dany)
#### Post date: [June 16, 2016, 4:23am UTC](https://discuss.elastic.co/t/unable-to-delete-indexes-failed-to-process-cluster-event-acquire-index-lock-within-30s/16899/5 "2016-06-16T04:23:53Z")
I am getting the same issue . Is there a way to force delete the index through API or from the disk?
Any suggestions would be really helpful.
---
### Author:  [@dany](https://discuss.elastic.co/u/dany)
#### Post date: [June 29, 2016, 1:06am UTC](https://discuss.elastic.co/t/unable-to-delete-indexes-failed-to-process-cluster-event-acquire-index-lock-within-30s/16899/6 "2016-06-29T01:06:49Z")
We found the issue. Just restart the master node and force the cluster to choose different master.
In my case the issue was something went wrong while acquiring lock from master. So I changed the master. It worked 🙂
---
### Author:  [@bistuXu](https://discuss.elastic.co/u/bistuXu)
#### Post date: [July 25, 2016, 10:35am UTC](https://discuss.elastic.co/t/unable-to-delete-indexes-failed-to-process-cluster-event-acquire-index-lock-within-30s/16899/7 "2016-07-25T10:35:27Z")
I met the issus too ,but how to solve the probem .when my machine met the problem ,the systemctl is disabled and timeout
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 5, 2017, 10:33pm UTC](https://discuss.elastic.co/t/unable-to-delete-indexes-failed-to-process-cluster-event-acquire-index-lock-within-30s/16899/8 "2017-07-05T22:33:11Z")