MagmaKVStore::saveDocs vb:540 WriteDocs failed. Status:Invalid: kvstore-540/rev-000000001: seqno (2) should always increase monotonically between write batches (164) numCommits:0

Steps to repro:

1. Create a 4 node cluster(replicas=3)
2. Created 5 million items(doc size =1024 bytes)
3. Stopped persistence on one of the nodes
4. Started doc ops(create:expiry:update) on node(where persistence is stopped)
5. Killed memcached on node(where persistence is stopped) to trigger rollback on other nodes
6. During rollback keep killing memcached on all the nodes(which are rolling back)
7. Repeat above steps multiple times.

guides/gradlew --refresh-dependencies testrunner -P jython=/opt/jython/bin/jython -P 'args=-i /tmp/testexec.91973.ini bucket_storage=magma,rerun=false,GROUP=P2;crash,randomize_value=True,bucket_eviction_policy=fullEviction,get-cbcollect-info=True,infra_log_level=debug,log_level=debug,enable_dp=false,collect_pcaps=True,get-cbcollect-info=True,autoCompactionDefined=true,upgrade_version=7.1.0-2071 -t storage.magma.magma_rollback.MagmaRollbackTests.test_crash_during_rollback,num_items=5000000,doc_size=1024,nodes_init=4,num_rollbacks=5,vbuckets=1024,rollback_items=500,replicas=3,key_size=12,init_loading=False,doc_ops=expiry:create:update:delete,num_collections=0,process_concurrency=2,collections_for_rollback=1,threads_to_use=1000,target_active_nodes=3,GROUP=P2;crash'

Note: 165 items couldn't be persisted in 1200s.
Found these messages in the logs:
2022-01-17T05:50:22.448585-08:00 CRITICAL (default) MagmaKVStore::saveDocs vb:540 WriteDocs failed. Status:Invalid: kvstore-540/rev-000000001: seqno (2) should always increase monotonically between write batches (164) numCommits:0

Ankush Sharma, can you please update the test steps?
Here is the test details: http://qe-jenkins.sc.couchbase.com/job/test_suite_executor-TAF/6951/artifact/job_logs/testrunner-22-Jan-17_04-37-09/test_2/