[ https://issues.jboss.org/browse/ISPN-4573?page=com.atlassian.jira.plugin.... ] Radim Vansa updated ISPN-4573: ------------------------------ Description: When I try to fill distributed cache with indexing enabled concurrently from multiple threads, I get {code} org.hibernate.search.exception.SearchException: HSEARCH000083: Unable to serialize List<LuceneWork> at org.hibernate.search.indexes.serialization.impl.LuceneWorkSerializerImpl.toSerializedModel(LuceneWorkSerializerImpl.java:92) ... Caused by: java.lang.ArrayIndexOutOfBoundsException: 6 at java.util.ArrayList.add(ArrayList.java:412) at org.hibernate.search.indexes.serialization.avro.impl.AvroSerializer.addFieldWithStringData(AvroSerializer.java:258) at org.hibernate.search.indexes.serialization.impl.LuceneWorkSerializerImpl.buildDocument(LuceneWorkSerializerImpl.java:174) at org.hibernate.search.indexes.serialization.impl.LuceneWorkSerializerImpl.toSerializedModel(LuceneWorkSerializerImpl.java:80) {code} There are multiple different exceptions as cause, but the reason is one: {{AvroSerializer}} is not thead-safe. {{AvroSerializerProvider}} returns always the same instance, and so does {{InfinispanIndexManager}} (or rather {{DirectoryBasedIndexManager}}) return the same instance of {{LuceneWorkSerializerImpl}} wrapping the {{AvroSerializerProvider}}. This results in failed writes, corrupted data and another fun. was: When I try to fill distributed cache with indexing enabled concurrently from multiple threads, I get {code} org.hibernate.search.exception.SearchException: HSEARCH000083: Unable to serialize List<LuceneWork> at org.hibernate.search.indexes.serialization.impl.LuceneWorkSerializerImpl.toSerializedModel(LuceneWorkSerializerImpl.java:92) ... Caused by: java.lang.ArrayIndexOutOfBoundsException: 6 at java.util.ArrayList.add(ArrayList.java:412) at org.hibernate.search.indexes.serialization.avro.impl.AvroSerializer.addFieldWithStringData(AvroSerializer.java:258) at org.hibernate.search.indexes.serialization.impl.LuceneWorkSerializerImpl.buildDocument(LuceneWorkSerializerImpl.java:174) at org.hibernate.search.indexes.serialization.impl.LuceneWorkSerializerImpl.toSerializedModel(LuceneWorkSerializerImpl.java:80) {code} There are multiple different exceptions as cause, but the reason is one: {{AvroSerializer}} is not thead-safe. {{AvroSerializerProvider}} returns always the same instance, and so does {{InfinispanIndexManager}} (or rather {{DirectoryBasedIndexManager}}) return the same instance of {{LuceneWorkSerializerImpl}} wrapping the {{AvroSerializerProvider}}. This results in failed writes, corrupted data and another fun. -- This message was sent by Atlassian JIRA (v6.2.6#6264)