Fix ssl npe

[CrazyHZM]

Signed-off-by: crazyhzm crazyhzm@gmail.com

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Brief changelog

Verifying this change

Checklist

• Make sure there is a GitHub_issue field for the change (usually before you start working on it). Trivial changes like typos do not require a GitHub issue. Your pull request should address just this issue, without pulling in other changes - one PR resolves one issue.
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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

0.0% Coverage
0.0% Duplication

[codecov-commenter]

Codecov Report

Merging #11093 (e5d6389) into 3.1 (7cccc4f) will decrease coverage by 4.74%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##                3.1   #11093      +/-   ##
============================================
- Coverage     69.30%   64.56%   -4.75%     
+ Complexity      127       14     -113     
============================================
  Files          1471     1420      -51     
  Lines         77270    59072   -18198     
  Branches      13568     8673    -4895     
============================================
- Hits          53554    38138   -15416     
+ Misses        19037    16896    -2141     
+ Partials       4679     4038     -641     

Impacted Files	Coverage Δ
...port/netty4/NettyPortUnificationServerHandler.java	50.00% <0.00%> (-2.55%)	⬇️
...luster/router/script/ScriptStateRouterFactory.java	0.00% <0.00%> (-100.00%)	⬇️
...he/dubbo/test/common/impl/GreetingServiceImpl.java	0.00% <0.00%> (-100.00%)	⬇️
...zookeeper/curator/CuratorZookeeperTransporter.java	0.00% <0.00%> (-100.00%)	⬇️
...nfigure/DubboRelaxedBinding2AutoConfiguration.java	0.00% <0.00%> (-100.00%)	⬇️
.../apache/dubbo/test/spring/SpringXmlConfigTest.java	0.00% <0.00%> (-96.16%)	⬇️
...egistrycenter/context/ZookeeperWindowsContext.java	0.00% <0.00%> (-81.82%)	⬇️
...istrycenter/processor/FindPidWindowsProcessor.java	5.40% <0.00%> (-81.09%)	⬇️
...pc/cluster/router/file/FileStateRouterFactory.java	0.00% <0.00%> (-80.96%)	⬇️
...ycenter/processor/KillProcessWindowsProcessor.java	10.00% <0.00%> (-80.00%)	⬇️
... and 447 more

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[AlbumenJ]

LGTM