[master] Fix #9086 NPE

[wangchengming666]

fix #9086 NPE

[codecov-commenter]

Codecov Report

Merging #9420 (f4c508c) into master (9cfb1ae) will decrease coverage by 0.77%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master    #9420      +/-   ##
============================================
- Coverage     60.82%   60.04%   -0.78%     
- Complexity      445      446       +1     
============================================
  Files          1100     1100              
  Lines         44509    44511       +2     
  Branches       6475     6476       +1     
============================================
- Hits          27073    26728     -345     
- Misses        14466    14834     +368     
+ Partials       2970     2949      -21     

Impacted Files	Coverage Δ
...n/java/org/apache/dubbo/metadata/MetadataInfo.java	34.94% <0.00%> (-0.38%)	⬇️
...ookeeper/ZookeeperDynamicConfigurationFactory.java	0.00% <0.00%> (-66.67%)	⬇️
...gcenter/wrapper/CompositeDynamicConfiguration.java	0.00% <0.00%> (-63.34%)	⬇️
...pport/zookeeper/ZookeeperDynamicConfiguration.java	0.00% <0.00%> (-60.00%)	⬇️
...fig/configcenter/TreePathDynamicConfiguration.java	31.42% <0.00%> (-54.29%)	⬇️
...a/org/apache/dubbo/rpc/filter/AccessLogFilter.java	28.35% <0.00%> (-50.75%)	⬇️
.../dubbo/metadata/report/MetadataReportInstance.java	12.50% <0.00%> (-40.63%)	⬇️
...va/org/apache/dubbo/rpc/support/AccessLogData.java	53.16% <0.00%> (-37.98%)	⬇️
.../configcenter/support/zookeeper/CacheListener.java	0.00% <0.00%> (-32.44%)	⬇️
...gistry/client/migration/MigrationRuleListener.java	55.88% <0.00%> (-23.53%)	⬇️
... and 36 more

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[chickenlj]

This check can avoid NPE from happing by checking before use, however, I don't think it can resolve the root methodParams initialization issue as it has a race condition that needs to be resolved.

[chickenlj]

Merged as an enhancement for avoiding #9086 NPE from appearing but it cannot resolve the root issue.