CrateDB version 4.1.2

• JVM version: openjdk version "11" 2018-09-25
• Kernel: 4.15.0-43-generic #46~16.04.1-Ubuntu SMP Fri Dec 7 13:31:08 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
• Distribution: Ubuntu 16.04.5 LTS
• Number of nodes: 4

Problem description:
For the last 72h or for one of the tables with characteristics as below:

• Configured Replicas: 0-1
• Configured Shards: 8
• Started Shards: 15
• Missing Shards: 0
• Total Records: 747.5 Million
• Unavailable Records: 0
• Size (Sum of primary shards): 981.7 GB

Status shows:

• Health: warning
• Under-Replicated Records: 93.4 Million
• Under-Replicated Shards: 1
• Recovery: 93.8%

and there is no progress in recovery at all for last 3 days or so.

What I would expect is CrateDB to make automated recovery within sensible period of time (several hours).

Please let me know if there is any additional diagnostic logs / information I can provide to help understand root cause of the issue and fix it.

Regards,
Chris