wangfeigithub

Sometimes there are mistakes, sometimes there are no mistakes. And I changed another Zookeeper also occasionally appeared like this

Container from a bad node Exit code :50 is displayed when the SQL is executed. So what does this look like

> Zk has no error and I tried two ZKS. The error on the YARN page above will occasionally occur. Nor should the Internet. Using Ali's EMR

I wonder why it occasionally happens.------------------- java.lang.NoClassDefFoundError: Could not initialize class org.slf4j.MDC ---Could this mistake be the root cause? What causes it?

> > java.lang.NoClassDefFoundError: Could not initialize class org.slf4j.MDC > > I think it was caused by your Spark application classpath jars conflicts. Maybe there is a conflict with org.slf4j. I...