WARN [org.jgroups.protocols.SYM_ENCRYPT]: exception occurred decrypting message

During this testing scenario

• Workflow:
• * Start two clusters, 16 clients, let them do requests.
• * Scale up to 3 servers, while clients do requests.
• * Assert that there are no errors in logs.
• * Assert that clients stick to their old servers.
• * Stop clients, start a new batch of 16.
• * Let them do requests.
• * Verify all three servers respond.

This warning is emitted

�[0m�[33m05:57:05,501 WARN  [org.jgroups.protocols.SYM_ENCRYPT] (thread-18,ee,hejbc-1-xws56) hejbc-1-xws56: exception occurred decrypting message