20200229 fix cloud datanetworkfail

[atellwu]

Motivation:

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To make others understand what is the problem you're trying to solve.

Modification:

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Result:

Fixes #.

If there is no issue then describe the changes introduced by this PR.

[codecov-io]

Codecov Report

Merging #93 into master will decrease coverage by 0.3%.
The diff coverage is 66.66%.

@@             Coverage Diff              @@
##             master      #93      +/-   ##
============================================
- Coverage     62.75%   62.45%   -0.31%     
  Complexity       44       44              
============================================
  Files           429      429              
  Lines         15445    15461      +16     
  Branches       1488     1489       +1     
============================================
- Hits           9693     9656      -37     
- Misses         4734     4787      +53     
  Partials       1018     1018

Impacted Files	Coverage Δ	Complexity Δ
...ta/event/handler/DataServerChangeEventHandler.java	41.41% <0%> (-0.43%)	0 <0> (ø)
...ssion/scheduler/task/DataChangeFetchCloudTask.java	62.12% <100%> (+2.44%)	0 <0> (ø)	⬇️
...istry/server/session/registry/SessionRegistry.java	75.58% <100%> (+0.14%)	0 <0> (ø)	⬇️
...rver/session/node/service/DataNodeServiceImpl.java	60.55% <100%> (-6.49%)	0 <0> (ø)
...egistry/server/session/store/SessionInterests.java	79.51% <33.33%> (+2.77%)	0 <0> (ø)	⬇️
...ver/session/bootstrap/SessionServerConfigBean.java	50.93% <50%> (-0.72%)	0 <0> (ø)
.../bootstrap/MetaServerInitializerConfiguration.java	57.14% <0%> (-14.29%)	0% <0%> (ø)
...egistry/server/meta/store/SessionStoreService.java	56.59% <0%> (-9.35%)	0% <0%> (ø)
...istry/server/meta/registry/MetaServerRegistry.java	66.66% <0%> (-9.1%)	0% <0%> (ø)
...a/registry/task/scheduler/TimedSupervisorTask.java	65.51% <0%> (-6.9%)	0% <0%> (ø)
... and 14 more

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