[infinispan-issues] [JBoss JIRA] (ISPN-3738) Entry version gets lost during topology change -> NPE

Entry version gets lost during topology change -> NPE ----------------------------------------------------- Key: ISPN-3738 URL: https://issues.jboss.org/browse/ISPN-3738 Project: Infinispan Issue Type: Bug Components: Distributed Cache Affects Versions: 6.0.0.Final Reporter: Radim Vansa Assignee: Pedro Ruivo Priority: Critical Labels: 620 Fix For: 6.1.0.Final Replicated TX cache with WSC, A, B are in cluster, C is joining 0. The current CH already contains A and B as owners, C is joining (is not primary owner of anything yet). B is primary owner of K=V. 1. A sends PrepareCommand to B and C with put(K, V) (V is null on all nodes) 2. C receives PrepareCommand and responds with no versions (it is not primary owner) 3. topology changes on B - primary ownership of K is transfered to C 4. B receives PrepareCommand, responds without K's version (it is not primary) 5. B forwards the Prepare to C as it sees that the command has lower topology ID 6. C responds to B's prepare with version of K 7. K version is *not* added to B's response, B responds to A 8. A finds out that topology has changed, forwards prepare to C 9. C responds to C's prepare with version of K 10. A receives C's response, but the versions are not added to transaction 11. A sends out CommitCommand missing version of K 12. all nodes record K=V without version as usual ImmortalCacheEntry 13. the next time we try to increase version of K=V, we fail with NPE in SimpleClusteredVersionGenerator (actually when it tries to throw IllegalArgumentException because the null version is unexpected version class)