xiaozhihong created IOTDB-3833:
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Summary: Grafana connects to iotdb and reports expression should
not be null
Key: IOTDB-3833
URL: https://issues.apache.org/jira/browse/IOTDB-3833
Project: Apache IoTDB
Issue Type: Bug
Components: Connectors/Grafana
Affects Versions: 0.14.0-SNAPSHOT
Reporter: xiaozhihong
Assignee: luke.miao
Attachments: image-2022-07-15-13-31-19-994.png,
image-2022-07-15-13-31-55-605.png
Start 1 confignode and 1 datanode, then open brouser about grafana web ,
execute writing and query by benchmark. At last, I saw this error message on
the Grafana browser page.
!image-2022-07-15-13-31-19-994.png|width=484,height=383!
!image-2022-07-15-13-31-55-605.png|width=480,height=153!
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