Mattermost, Inc.

Error during Installation in Oracle Linux using Mysql

I am facing error while installing the mattermost app. The error log is shown below:

{“level”:“info”,“ts”:1565199231.8278935,“caller”:“utils/i18n.go:83”,“msg”:“Loaded system translations for ‘en’ from ‘/opt/mattermost/i18n/en.json’”}
{“level”:“info”,“ts”:1565199231.8283541,“caller”:“app/server_app_adapters.go:58”,“msg”:“Server is initializing…”}
{“level”:“info”,“ts”:1565199231.8439739,“caller”:“sqlstore/supplier.go:224”,“msg”:“Pinging SQL master database”}
{“level”:“error”,“ts”:1565199232.334973,“caller”:“app/server_app_adapters.go:125”,“msg”:“SiteURL must be set. Some features will operate incorrectly if the SiteURL is not set. See documentation for details: http ://about.mattermost.com/default-site-url”}
{“level”:“info”,“ts”:1565199232.3358617,“caller”:“filesstore/localstore.go:33”,“msg”:“Able to write files to local storage.”}
{“level”:“info”,“ts”:1565199232.3393764,“caller”:“app/license.go:41”,“msg”:“License key from https ://mattermost.com required to unlock enterprise features.”}
{“level”:“info”,“ts”:1565199232.3617027,“caller”:“mlog/log.go:164”,“msg”:“Starting up plugins”}
{“level”:“info”,“ts”:1565199235.1963632,“caller”:“sqlstore/post_store.go:1279”,“msg”:“Post.Message supports at most 16383 characters (65535 bytes)”}
{“level”:“info”,“ts”:1565199236.871109,“caller”:“mlog/sugar.go:19”,“msg”:“Ensuring Surveybot exists”,“plugin_id”:“com.mattermost.nps”}
{“level”:“info”,“ts”:1565199236.9036195,“caller”:“app/server.go:213”,“msg”:“Current version is 5.13.0 (5.13.2/Wed Jul 24 17:25:26 UTC 2019/9a8b0906fdbf2c2a309db2400f4bcc5902800e2c/1ab74b3ea1137c385e03a9982dce917a4128f903)”}
{“level”:“info”,“ts”:1565199236.9039154,“caller”:“app/server.go:214”,“msg”:“Enterprise Enabled: true”}
{“level”:“info”,“ts”:1565199236.9041805,“caller”:“app/server.go:216”,“msg”:“Current working directory is /opt/mattermost”}
{“level”:“info”,“ts”:1565199236.9043167,“caller”:“app/server.go:217”,“msg”:“Loaded config”,“source”:“file:///opt/mattermost/config/config.json”}
{“level”:“info”,“ts”:1565199237.0973334,“caller”:“jobs/workers.go:68”,“msg”:“Starting workers”}
{“level”:“info”,“ts”:1565199237.09758,“caller”:“app/server.go:413”,“msg”:“Starting Server…”}
{“level”:“info”,“ts”:1565199237.0997772,“caller”:“jobs/schedulers.go:72”,“msg”:“Starting schedulers.”}
{“level”:“info”,“ts”:1565199237.1088572,“caller”:“app/server.go:479”,“msg”:“Server is listening on 0.0.0.0:8065”}
{“level”:“info”,“ts”:1565199237.1178105,“caller”:“app/web_hub.go:75”,“msg”:“Starting 16 websocket hubs”}
{“level”:“info”,“ts”:1565199284.6536834,“caller”:“go-plugin/stream.go:15”,“msg”:“segment 2019/08/07 23:04:44 error sending request: Post https://api.segment.io/v1/batch: dial tcp: lookup api .segment.io on 10.122.200.20:53: server misbehaving”,“plugin_id”:“com.mattermost.nps”,“source”:“plugin_stderr”}
{“level”:“info”,“ts”:1565199284.8654675,“caller”:“analytics-go/analytics.go:263”,“msg”:“error sending request: Post https://api.segment.io/v1/batch: dial tcp: lookup api .segment.io on 10.122.200.20:53: server misbehaving”,“source”:“segment”}