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Unable to connect to Cassandra cluster

Updated on March 11, 2021

This content applies only to On-premises and Client-managed cloud environments

A node cannot join the Decision Data Store (DDS) cluster.

This issue is caused by the failure of a DataStax driver. An error message is displayed in Pega Platform when trying to add a node to the cluster, for example:

[JAVA-1220] Driver should fail fast on subsequent connect/init calls if Cluster.manager.init() fails - DataStax
java.lang.IllegalArgumentException: initialArraySize cannot be negative but was: -2147483648
at com.datastax.driver.core.HostConnectionPool.initAsync(
at com.datastax.driver.core.SessionManager.replacePool(
at com.datastax.driver.core.SessionManager.maybeAddPool(
at com.datastax.driver.core.SessionManager.createPools(
at com.datastax.driver.core.SessionManager.initAsync(
at com.datastax.driver.core.Cluster.connectAsync(
at com.datastax.driver.core.Cluster.connectAsync(
at com.datastax.driver.core.Cluster.connect(

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