Storage rule replication hang for a long time. No network activity

Situation.

Storage rule replication process shows as active process in the source and target TSM server. But there is no network activity and data is not transferring between TSM servers.

Content.

Open file dsmffdc.log on the source TSM server and find lines with the pattern "[ FFDC_REPLICATIOIN ]". You can find lines something like this:

[04-06-2022 02:29:31.066][ FFDC_REPLICATION ]: (smtrans.c:11224) Cannot send DistDedupChunkVerb - termReason 1 indicated for session TARGET-TSM-01(89625).~

Resolution.

Cancel hang replication process and restart it again.