Hi - I am running Jakarta Bean Validation 6.1.2 under Apache Flink and running into the included "Caused by: java.io.NotSerializableException: com.sun.el.ExpressionFactoryImpl" error. Here are the gradle deps: compile 'org.hibernate.validator:hibernate-validator:6.1.2.Final' compile 'org.glassfish:jakarta.el:3.0.3' Thoughts? thx, - james org.apache.flink.api.common.InvalidProgramException: com.sun.el.ExpressionFactoryImpl@7ca33c24 is not serializable. The object probably contains or references non serializable fields. at org.apache.flink.api.java.ClosureCleaner.clean(ClosureCleaner.java:151) at org.apache.flink.api.java.ClosureCleaner.clean(ClosureCleaner.java:126) at org.apache.flink.api.java.ClosureCleaner.clean(ClosureCleaner.java:126) at org.apache.flink.api.java.ClosureCleaner.clean(ClosureCleaner.java:126) at org.apache.flink.api.java.ClosureCleaner.clean(ClosureCleaner.java:126) at org.apache.flink.api.java.ClosureCleaner.clean(ClosureCleaner.java:71) at org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.clean(StreamExecutionEnvironment.java:1821) at org.apache.flink.streaming.api.datastream.DataStream.clean(DataStream.java:188) at org.apache.flink.streaming.api.datastream.DataStream.map(DataStream.java:590) at com.lacuna.data.mds.EventProcessor.main(EventProcessor.java:49) Caused by: java.io.NotSerializableException: com.sun.el.ExpressionFactoryImpl at java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1185) at java.base/java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:349) WARNING: An illegal reflective access operation has occurred