Kibana not starting after upgrade 6.5- 7.6

i have upgrade elk cluster from 6.5 - 6.8 , upgrade metricbeat to 6.8 , all is fine
after that upgraded elasticsearch , kibana to 7.6.
But kinana is not starting and not error message

"type":"log","@timestamp":"2020-05-01T05:44:09Z","tags":["info","plugins-service"],"pid":31332,"message":"Plugin \"case\" is disabled."}

{"type":"log","@timestamp":"2020-05-01T05:44:15Z","tags":["warning","legacy-plugins"],"pid":31332,"path":"/usr/share/kibana/src/legacy/core_plugins/kbn_doc_views","message":"Skipping non-plugin directory at /usr/share/kibana/src/legacy/core_plugins/kbn_doc_views"}
{"type":"log","@timestamp":"2020-05-01T05:44:15Z","tags":["warning","legacy-plugins"],"pid":31332,"path":"/usr/share/kibana/src/legacy/core_plugins/markdown_vis","message":"Skipping non-plugin directory at /usr/share/kibana/src/legacy/core_plugins/markdown_vis"}
{"type":"log","@timestamp":"2020-05-01T05:44:15Z","tags":["warning","legacy-plugins"],"pid":31332,"path":"/usr/share/kibana/src/legacy/core_plugins/metric_vis","message":"Skipping non-plugin directory at /usr/share/kibana/src/legacy/core_plugins/metric_vis"}
{"type":"log","@timestamp":"2020-05-01T05:44:15Z","tags":["warning","legacy-plugins"],"pid":31332,"path":"/usr/share/kibana/src/legacy/core_plugins/metrics","message":"Skipping non-plugin directory at /usr/share/kibana/src/legacy/core_plugins/metrics"}
{"type":"log","@timestamp":"2020-05-01T05:44:15Z","tags":["warning","legacy-plugins"],"pid":31332,"path":"/usr/share/kibana/src/legacy/core_plugins/table_vis","message":"Skipping non-plugin directory at /usr/share/kibana/src/legacy/core_plugins/table_vis"}
{"type":"log","@timestamp":"2020-05-01T05:44:15Z","tags":["warning","legacy-plugins"],"pid":31332,"path":"/usr/share/kibana/src/legacy/core_plugins/tagcloud","message":"Skipping non-plugin directory at /usr/share/kibana/src/legacy/core_plugins/tagcloud"}
{"type":"log","@timestamp":"2020-05-01T05:44:15Z","tags":["warning","legacy-plugins"],"pid":31332,"path":"/usr/share/kibana/src/legacy/core_plugins/vega","message":"Skipping non-plugin directory at /usr/share/kibana/src/legacy/core_plugins/vega"}

Hi

So you've upgraded to 7.6 and Kibana doesn't start and there's no error message? There might be an issue with upgrading save object, since you've pasted only a part of the log messages when you're starting, could you provide all messages, maybe we can find a hint there

Thx and best,
Matthias

when run it manually i got the error . replacing elasticsearch.url to elasticsearch.hosts solved the issue