https://community.databricks.com/t5/data-engineering/random-noclassdeffound-error-when-running-job/m-p/71407#M34308 <P>We are running a job on a cluster with DBR 10.4 LTS Spark 3.2.1 and scala 2.12. Cluster is using 4 workers (spot instances) .The driver is not a spot instance</P><P>Randomly ( only on one environment and not all executions), we are getting the following error : <EM>java.lang.NoClassDefFoundError: Could not initialize class path.to.one.of.our.Class$</EM></P><P>The class does exists and is present in the jar we are loading as a dependant library in the job task definition. The jar was compiled with the same versions (3.2.1/2.12)</P><P>The environment is identical to other working ones and as I 've mentionned, just relaunching the same failing job&nbsp; once makes it succeed, without changing anything.</P><P>Any ideas regarding what could the problem possibly be ?</P> Mon, 03 Jun 2024 07:13:20 GMT abaet 2024-06-03T07:13:20Z https://community.databricks.com/t5/data-engineering/random-noclassdeffound-error-when-running-job/m-p/71407#M34308 <P>We are running a job on a cluster with DBR 10.4 LTS Spark 3.2.1 and scala 2.12. Cluster is using 4 workers (spot instances) .The driver is not a spot instance</P><P>Randomly ( only on one environment and not all executions), we are getting the following error : <EM>java.lang.NoClassDefFoundError: Could not initialize class path.to.one.of.our.Class$</EM></P><P>The class does exists and is present in the jar we are loading as a dependant library in the job task definition. The jar was compiled with the same versions (3.2.1/2.12)</P><P>The environment is identical to other working ones and as I 've mentionned, just relaunching the same failing job&nbsp; once makes it succeed, without changing anything.</P><P>Any ideas regarding what could the problem possibly be ?</P> Mon, 03 Jun 2024 07:13:20 GMT https://community.databricks.com/t5/data-engineering/random-noclassdeffound-error-when-running-job/m-p/71407#M34308 abaet 2024-06-03T07:13:20Z