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Panic if log_level settings is missing in function deployed using rest API

Description

Build 6.0.0-1592

Coming from- https://forums.couchbase.com/t/possible-bug-eventing-log-error-on-missing-log-level/18198

Observed following panic when deployed a function without log_level in settings using rest API.

On UI it shows bootstrapping and user cannot undeploy or delete a function. 

Here is command used:

curl -v -XPOST -d '{  "appname": "test1",  "appcode": "function OnUpdate(doc, meta) {}",  "depcfg": {    "Buckets": [      {        "alias": "bucket_test",        "bucket_name": "eventing-bucket-1"      }    ],    "metadata_bucket": "eventing",    "source_bucket": "bucket-1"  },  "settings": {    "dcp_stream_boundary": "from_now",    "deployment_status": true,    "processing_status": true,    "execution_timeout": 60  }}'  http://Administrator:password@172.23.97.177:8096/api/v1/functions/test1

Logs- https://s3.amazonaws.com/bugdb/jira/log_level_eventing/collectinfo-2018-09-04T054125-ns_1%40172.23.97.177.zip

Panic:

 

2018/09/03 22:35:15 Supervisor super_supervisor: super_supervisor: Failed service 'Producer => function: test1 tcpPort: ' (1.000000 failures of 5.000000), restarting: true, error: interface conversion: interface {} is nil, not string, stacktrace: goroutine 10516 [running]: github.com/couchbase/eventing/suptree.(*Supervisor).runService.func1.1(0xc42030e000, 0x1) /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/eventing/suptree/supervisor.go:392 +0xbc panic(0xbf37e0, 0xc42a95cb80) /home/couchbase/.cbdepscache/exploded/x86_64/go-1.10.3/go/src/runtime/panic.go:502 +0x229 github.com/couchbase/eventing/producer.(*Producer).parseDepcfg(0xc42dabdc00, 0xd38b30, 0xc42dabdc00) /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/eventing/producer/depcfg_parser.go:342 +0x3978 github.com/couchbase/eventing/producer.(*Producer).Serve(0xc42dabdc00) /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/eventing/producer/producer.go:90 +0x70 github.com/couchbase/eventing/suptree.(*Supervisor).runService.func1(0xc42030e000, 0xb896b2e800000001, 0xdc0580, 0xc42dabdc00) /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/eventing/suptree/supervisor.go:398 +0x63 created by github.com/couchbase/eventing/suptree.(*Supervisor).runService /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/eventing/suptree/supervisor.go:388 +0x5b 2018-09-03T22:35:15.269-07:00 [Info] Producer::parseDepcfg [test1] Opening up application file 2018/09/03 22:35:20 Supervisor super_supervisor: super_supervisor: Failed service 'Producer => function: test1 tcpPort: ' (1.890698 failures of 5.000000), restarting: true, error: interface conversion: interface {} is nil, not string, stacktrace: goroutine 10462 [running]: github.com/couchbase/eventing/suptree.(*Supervisor).runService.func1.1(0xc42030e000, 0x1) /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/eventing/suptree/supervisor.go:392 +0xbc panic(0xbf37e0, 0xc4289e5e80) /home/couchbase/.cbdepscache/exploded/x86_64/go-1.10.3/go/src/runtime/panic.go:502 +0x229 github.com/couchbase/eventing/producer.(*Producer).parseDepcfg(0xc42dabdc00, 0xd38b30, 0xc42dabdc00) /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/eventing/producer/depcfg_parser.go:342 +0x3978 github.com/couchbase/eventing/producer.(*Producer).Serve(0xc42dabdc00) /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/eventing/producer/producer.go:90 +0x70 github.com/couchbase/eventing/suptree.(*Supervisor).runService.func1(0xc42030e000, 0x1, 0xdc0580, 0xc42dabdc00) /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/eventing/suptree/supervisor.go:398 +0x63 created by github.com/couchbase/eventing/suptree.(*Supervisor).runService /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/eventing/suptree/supervisor.go:388 +0x5b

 

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Mahesh Mandhare September 19, 2018 at 4:38 AM

Verified that if log_level not provided then function gets deployed as "info" log level and panic does not occur.
Logged https://couchbasecloud.atlassian.net/browse/MB-31343#icft=MB-31343 for other parameter validations.

CB robot September 5, 2018 at 6:09 AM

Build couchbase-server-6.5.0-1287 contains eventing commit b8daa1b with commit message:
https://couchbasecloud.atlassian.net/browse/MB-31146#icft=MB-31146 Sanity check for existence of log_level setting

CB robot September 5, 2018 at 3:48 AM

Build couchbase-server-6.0.0-1605 contains eventing commit b8daa1b with commit message:
https://couchbasecloud.atlassian.net/browse/MB-31146#icft=MB-31146 Sanity check for existence of log_level setting

Abhishek Singh September 5, 2018 at 3:14 AM

Fix on master. Added documentation for some of the internal settings https://github.com/couchbase/eventing/blob/master/docs/settings-60.md. Will request QE to try out different combinations of different payloads to eventing /api/v1/ endpoints before closing this bug - please reopen if you find any issue.

Abhishek Singh September 4, 2018 at 8:03 AM

Fixed
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Created September 4, 2018 at 5:47 AM
Updated September 19, 2018 at 4:38 AM
Resolved September 5, 2018 at 3:11 AM
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