[ISSUE #2538]send trace data failed, print exception info

[xxd763795151]

Make sure set the target branch to develop

What is the purpose of the change

The original log does not log any error info when sending meessage trace data failed. It`s hard to find the cause of failed on th production environment. And if any people who do not know source code, they even do not know it has sent failed according to log.

Brief changelog

Modify log level from info to warn， And printing exception info.

Verifying this change

XXXX

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[coveralls]

Coverage decreased (-0.09%) to 51.849% when pulling a400da4 on xxd763795151:trace_data_log into 0239421 on apache:develop.

[codecov-io]

Codecov Report

Merging #2544 (a400da4) into develop (0239421) will increase coverage by 0.01%.
The diff coverage is 33.33%.

@@              Coverage Diff              @@
##             develop    #2544      +/-   ##
=============================================
+ Coverage      45.97%   45.98%   +0.01%     
- Complexity      4318     4322       +4     
=============================================
  Files            547      547              
  Lines          36236    36236              
  Branches        4808     4808              
=============================================
+ Hits           16658    16663       +5     
- Misses         17491    17492       +1     
+ Partials        2087     2081       -6     

Impacted Files	Coverage Δ	Complexity Δ
...he/rocketmq/client/trace/AsyncTraceDispatcher.java	73.60% <33.33%> (-0.51%)	17.00 <0.00> (ø)
...tmq/logappender/log4j2/RocketmqLog4j2Appender.java	36.66% <0.00%> (-8.34%)	4.00% <0.00%> (ø%)
...ain/java/org/apache/rocketmq/test/util/MQWait.java	43.24% <0.00%> (-5.41%)	3.00% <0.00%> (ø%)
...he/rocketmq/client/impl/consumer/ProcessQueue.java	57.67% <0.00%> (-4.19%)	31.00% <0.00%> (-1.00%)
...nt/impl/consumer/ConsumeMessageOrderlyService.java	38.98% <0.00%> (-3.62%)	16.00% <0.00%> (ø%)
...ava/org/apache/rocketmq/filter/util/BitsArray.java	58.11% <0.00%> (-1.71%)	29.00% <0.00%> (-1.00%)
...che/rocketmq/namesrv/kvconfig/KVConfigManager.java	59.18% <0.00%> (-1.03%)	11.00% <0.00%> (-1.00%)
...ketmq/client/impl/consumer/PullMessageService.java	75.55% <0.00%> (ø)	9.00% <0.00%> (ø%)
...etmq/client/latency/LatencyFaultToleranceImpl.java	50.00% <0.00%> (ø)	8.00% <0.00%> (ø%)
... and 7 more

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[xxd763795151]

This is an outdated pr, may be has been fixed or fix it later, so I close it now.
I`m sorry for rembering to deal with it now.