Inconsistent constant pool data in classfile

Question

I am trying to use spark cassandra connector to fetch values from the table. The load() yields the IncompatibleClassChangeError. My development environment is defined as follows,
Intellij : 2019.3.2
Scala version : 2.12.10
Scala binary version : 2.12
Spark version : 2.4.4
Spark cassandra connector : 2.4.2
Exception in thread "main" java.lang.IncompatibleClassChangeError: Inconsistent constant pool data in classfile for class com/datastax/spark/connector/cql/StructDef. Method 'java.lang.Object $anonfun$missingColumns$1$adapted(com.datastax.spark.connector.cql.StructDef, com.datastax.spark.connector.ColumnRef)' at index 182 is CONSTANT_MethodRef and should be CONSTANT_InterfaceMethodRef Which libraries creates the exception?

Albumin

I suspect that it pulled cassandra connector compiled for 2.11 – Gawk

please add the exact maven coordinates for this dependency.... – Gawk

may be there are jar conflicts, when I use presto, I face the same problem, I found out that presto-jdbc and prestodb-jdbc are both on the classpath – Ensoul

Answer 1

I encountered same issue with loading data from the Cassandra version 4 by using the Spark 3.1.3 and the Scala 2.12 and the Java 17.

My issue resolved by reducing version of Java to 8.

Unthinkable