Version

0.8.0 branch

Describe what's wrong

Sometimes spark-sql display:
Sometimes ok.

We found this is occured when spark-connector-xxx.jar was loaded before slf4j.jar which already in ${spark_home}/jars.

The spark-connector-xxx.jar containes slf4j class which is 2.* versrion, and spark sl4j.jar is 1.x. The two versions are not compatible. We should not package slf4j in spark-connector-xxx.jar.

Error message and/or stacktrace

No SLF4J providers were found.

How to reproduce

Continuously restarting Spark SQL. Occasionally, there will be one or two occurrences.

Additional context

No response