NPE when mapping @ManyToMany

[rbygrave]

From google group post:

I use ebean framework with L3 cache Elasticsearch (ebean-elastic). I need caching @manytomany property. I used @docstore(doc="id,name") annotation, but select throws null pointer exception. Docs describe mapping only @onetomany or @manytoone annotations.

Question: How to use mapping @manytomany annotations ebean with elasticsearch L3 cache?

I attached stack trace:

java.lang.NullPointerException: null
at com.fasterxml.jackson.core.json.WriterBasedJsonGenerator._writeString(WriterBasedJsonGenerator.java:908)
at com.fasterxml.jackson.core.json.WriterBasedJsonGenerator._writeFieldName(WriterBasedJsonGenerator.java:163)
at com.fasterxml.jackson.core.json.WriterBasedJsonGenerator.writeFieldName(WriterBasedJsonGenerator.java:128)
at com.fasterxml.jackson.core.JsonGenerator.writeArrayFieldStart(JsonGenerator.java:1629)
at com.avaje.ebeanservice.elastic.querywriter.ElasticDocQueryContext.writeIn(ElasticDocQueryContext.java:441)
at com.avaje.ebeaninternal.server.expression.InExpression.writeDocQuery(InExpression.java:51)
at com.avaje.ebeaninternal.server.expression.DefaultExpressionList.writeDocQuery(DefaultExpressionList.java:170)
at com.avaje.ebeanservice.elastic.querywriter.ElasticDocQueryContext.writeFilter(ElasticDocQueryContext.java:134)
at com.avaje.ebeanservice.elastic.querywriter.ElasticDocQueryContext.writeElastic(ElasticDocQueryContext.java:112)
at com.avaje.ebeanservice.elastic.querywriter.ElasticDocQueryContext.asElasticQuery(ElasticDocQueryContext.java