# NullPointerException in Elasticsearch when adding Index Pattern in kibana **URL:** \ **Category:** Elasticsearch\ **Created:** [June 27, 2019, 11:54am UTC](https://discuss.elastic.co/t/nullpointerexception-in-elasticsearch-when-adding-index-pattern-in-kibana/187817 "2019-06-27T11:54:04Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![marekm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/marekm/32/48924_2.png) [@marekm](https://discuss.elastic.co/u/marekm)\ **Post date:** [June 27, 2019, 11:54am UTC](https://discuss.elastic.co/t/nullpointerexception-in-elasticsearch-when-adding-index-pattern-in-kibana/187817/1 "2019-06-27T11:54:05Z")
Hey, I noticed the following exception in the Elasticsearch logs ``` [2019-06-27T13:05:54,761][DEBUG][o.e.a.f.TransportFieldCapabilitiesIndexAction] [mpps-st-elastic-1] null: failed to execute [org.elasticsearch.action.fieldcaps.FieldCapabilitiesIndexRequest@37bdc2bd] org.elasticsearch.transport.RemoteTransportException: [mpps-st-elastic-1][10.99.99.34:9300][indices:data/read/field_caps[index][s]] Caused by: java.lang.NullPointerException at org.elasticsearch.action.fieldcaps.TransportFieldCapabilitiesIndexAction.shardOperation(TransportFieldCapabilitiesIndexAction.java:105) ~[elasticsearch-6.7.2.jar:6.7.2] at org.elasticsearch.action.fieldcaps.TransportFieldCapabilitiesIndexAction.shardOperation(TransportFieldCapabilitiesIndexAction.java:46) ~[elasticsearch-6.7.2.jar:6.7.2] at org.elasticsearch.action.support.single.shard.TransportSingleShardAction$1.doRun(TransportSingleShardAction.java:115) [elasticsearch-6.7.2.jar:6.7.2] at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:751) [elasticsearch-6.7.2.jar:6.7.2] at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) [elasticsearch-6.7.2.jar:6.7.2] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) [?:?] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) [?:?] at java.lang.Thread.run(Thread.java:834) [?:?] ``` This exception appears in the Elasticsearch logs when trying to add in a kibana index pattern. ![image](https://us1.discourse-cdn.com/elastic/original/3X/4/5/454589f843acb85e4424ffbfe8fa75a493973793.png) And i can see only meta fields ![image](https://us1.discourse-cdn.com/elastic/original/3X/0/0/00997fb8696f8c897ff4ad58dba8dd48c48509dc.png) Definition of the index: ``` DELETE /test02 PUT test02 { "mappings": { "properties": { "app_name": { "type": "text", "fields": { "keyword": { "type": "keyword", "ignore_above": 256 }, "prefix_app_name": { "type": "text", "index_prefixes": { "min_chars": 1, "max_chars": 19 } } } } } } } POST /test02/_doc { "app_name":"my super app1" } ``` **I suspect that the reason for the problems is using `index_prefixes`.** When I create an index patter for an analogical index (test01), but without index\_prefixes, the problem does not appear. ``` DELETE /test01 PUT test01 { "mappings": { "properties": { "app_name": { "type": "text", "fields": { "keyword": { "type": "keyword", "ignore_above": 256 } } } } } } POST /test01/_doc { "app_name":"my super app1" } ``` And I can see all fields ![image](https://us1.discourse-cdn.com/elastic/original/3X/b/c/bc6520d6a5db9ffe89957d1a1eb4b3e12c04b0c3.png) I tested this on Elasticsearch 6.7.2, Kibana 6.7.2 and on Elasticsearch 6.8.0, Kibana 6.8.0. ---
**Author:** ![marekm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/marekm/32/48924_2.png) [@marekm](https://discuss.elastic.co/u/marekm)\ **Post date:** [June 28, 2019, 7:43am UTC](https://discuss.elastic.co/t/nullpointerexception-in-elasticsearch-when-adding-index-pattern-in-kibana/187817/2 "2019-06-28T07:43:30Z")
I noticed same issue in latest Elasticsearch 7.2.0 and Kibana 7.2.0 ``` [2019-06-28T09:30:23,773][DEBUG][o.e.a.f.TransportFieldCapabilitiesIndexAction] [marekm] null: failed to execute [org.elasticsearch.action.fieldcaps.FieldCapabilitiesIndexRequest@39f72cd4] org.elasticsearch.transport.RemoteTransportException: [marekm][127.0.0.1:9300][indices:data/read/field_caps[index][s]] Caused by: java.lang.NullPointerException at org.elasticsearch.action.fieldcaps.TransportFieldCapabilitiesIndexAction.shardOperation(TransportFieldCapabilitiesIndexAction.java:106) ~[elasticsearch-7.2.0.jar:7.2.0] at org.elasticsearch.action.fieldcaps.TransportFieldCapabilitiesIndexAction.shardOperation(TransportFieldCapabilitiesIndexAction.java:46) ~[elasticsearch-7.2.0.jar:7.2.0] at org.elasticsearch.action.support.single.shard.TransportSingleShardAction$1.doRun(TransportSingleShardAction.java:113) ~[elasticsearch-7.2.0.jar:7.2.0] at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:758) [elasticsearch-7.2.0.jar:7.2.0] at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) [elasticsearch-7.2.0.jar:7.2.0] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_171] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_171] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_171] ``` Please help. Am I doing something incorrectly ? This is a bug in Elasticsearch / Kibana ? ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [June 28, 2019, 8:13am UTC](https://discuss.elastic.co/t/nullpointerexception-in-elasticsearch-when-adding-index-pattern-in-kibana/187817/3 "2019-06-28T08:13:10Z")
Not sure but it's marked as a DEBUG log. ---
**Author:** ![marekm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/marekm/32/48924_2.png) [@marekm](https://discuss.elastic.co/u/marekm)\ **Post date:** [June 28, 2019, 9:24am UTC](https://discuss.elastic.co/t/nullpointerexception-in-elasticsearch-when-adding-index-pattern-in-kibana/187817/4 "2019-06-28T09:24:39Z")
Thank you for your response. Yes, it is marked as DEBUG, but.. for me **NullPointerException** means that something goes really wrong in unexpected way (I'm Java dev). The NPE is thrown by `org.elasticsearch.action.fieldcaps.TransportFieldCapabilitiesIndexAction.shardOperation(TransportFieldCapabilitiesIndexAction.java:106)` line 106: `String type = mapper.nested().isNested() ? "nested" : "object";` For me it's means that mapper or mapper.nested is null.. and I dont known why. In addition, Kibana still does not see the index fields and I can not implement the planned functionalities. ![image](https://us1.discourse-cdn.com/elastic/original/3X/8/b/8b88ee600398d15eb376e65e4e10e001cac3ecf0.png) Please let me know if I am using index\_prefixes in the wrong way, or is it a Elasticsearch bug. Meantime I will try to make some debug Elasticsearch source code. This can be interesting adventure 😄 Regards ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [June 28, 2019, 11:11am UTC](https://discuss.elastic.co/t/nullpointerexception-in-elasticsearch-when-adding-index-pattern-in-kibana/187817/5 "2019-06-28T11:11:04Z")
Absolutely. Could you open an issue in elasticsearch repo? I "think" the issue is coming from Kibana though which is may be misreading the mapping but at least we should not keep an NPE in the code. ---
**Author:** ![marekm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/marekm/32/48924_2.png) [@marekm](https://discuss.elastic.co/u/marekm)\ **Post date:** [June 28, 2019, 12:37pm UTC](https://discuss.elastic.co/t/nullpointerexception-in-elasticsearch-when-adding-index-pattern-in-kibana/187817/6 "2019-06-28T12:37:49Z")
According to your advice, I opened a issue: > ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 26, 2019, 12:37pm UTC](https://discuss.elastic.co/t/nullpointerexception-in-elasticsearch-when-adding-index-pattern-in-kibana/187817/7 "2019-07-26T12:37:52Z")
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