Indexing stuck on couchbase server

I got a stuck issue for view indexing on couchbase server many times with following details:

  1. Couchbase server version: 4.1.1-5914 Enterprise Edition (build-5914)
  2. Sync gateway version: 1.2.1(4;26c202a)
  3. Total no. of files on Couchbase server : 441
  4. Total no. of return record from the stuck view : 4 (4 of 13KB json files and 4 of 65KB PDF attachment)

I need to restart the Couchbase server or init the view again for resuming the view normally.

I’ve reviewed all of the log files from couchbase server and sync gateway, seems nothing can see.

Please help, thanks.