Hi @lsianturi,
These are log messages from ns_server. I don’t see any indexer specific errors in these messages.
If indexer process is crashing intermittently, you should look into indexer.log for evidence. If you want, you can attach indexer.log file here. Also, lookout for errors (if any) in starting the indexer process in babysitter.log file.
By the way, which version of couchbase server you are using? Also, is it a community edition or enterprise edition?