lucaspeng12138 opened a new issue, #5567:
URL: https://github.com/apache/inlong/issues/5567
### What happened
Master start failed with NullPointerException.
java.lang.NullPointerException: null
at
io.prometheus.client.CollectorRegistry.collectorNames(CollectorRegistry.java:119)
~[simpleclient-0.14.1.jar:?]
at
io.prometheus.client.CollectorRegistry.register(CollectorRegistry.java:50)
~[simpleclient-0.14.1.jar:?]
at io.prometheus.client.Collector.register(Collector.java:308)
~[simpleclient-0.14.1.jar:?]
at io.prometheus.client.Collector.register(Collector.java:301)
~[simpleclient-0.14.1.jar:?]
at
org.apache.inlong.tubemq.server.master.stats.prometheus.MasterPromMetricService.start(MasterPromMetricService.java:52)
~[tubemq-server-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT]
at
org.apache.inlong.tubemq.server.master.TMaster.<init>(TMaster.java:219)
~[tubemq-server-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT]
at
org.apache.inlong.tubemq.server.tools.MasterStartup.main(MasterStartup.java:44)
~[tubemq-server-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT]
### What you expected to happen
Master start normally.
### How to reproduce
File:
inlong-tubemq/tubemq-server/src/main/java/org/apache/inlong/tubemq/server/master/stats/prometheus/MasterPromMetricService.java
Caused by _start()_ function, _register()_ will use mfs which is returned
from _collect()_. And when tubemq-master start, _collect()_ will return null.
Then NullPointerException happens.
### Environment
_No response_
### InLong version
master
### InLong Component
InLong TubeMQ
### Are you willing to submit PR?
- [ ] Yes, I am willing to submit a PR!
### Code of Conduct
- [X] I agree to follow this project's [Code of
Conduct](https://www.apache.org/foundation/policies/conduct)
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