yes those are errors from storm worker, below you can find example. I do not use worker.childopts in ambari but I can experiment to change its values ("TOPOLOGY WORKER JVM OPTIONS") while deploying topology from SAM. What do you suggest to put there ? java.lang.RuntimeException: java.lang.reflect.InvocationTargetException at com.zaxxer.hikari.util.PropertyElf.setProperty(PropertyElf.java:171) at com.zaxxer.hikari.util.PropertyElf.setTargetFromProperties(PropertyElf.java:62) at com.zaxxer.hikari.HikariConfig.<init>(HikariConfig.java:128) at org.apache.storm.jdbc.common.HikariCPConnectionProvider.prepare(HikariCPConnectionProvider.java:46) at org.apache.storm.jdbc.bolt.AbstractJdbcBolt.prepare(AbstractJdbcBolt.java:49) at org.apache.storm.jdbc.bolt.JdbcInsertBolt.prepare(JdbcInsertBolt.java:78) at com.hortonworks.streamline.streams.runtime.storm.bolt.jdbc.StreamlineJdbcInsertBolt.prepare(StreamlineJdbcInsertBolt.java:20) at org.apache.storm.daemon.executor$fn__9866$fn__9879.invoke(executor.clj:794) at org.apache.storm.util$async_loop$fn__555.invoke(util.clj:482) at clojure.lang.AFn.run(AFn.java:22) at java.lang.Thread.run(Thread.java:745) Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at com.zaxxer.hikari.util.PropertyElf.setProperty(PropertyElf.java:163) ... 10 more Caused by: java.lang.RuntimeException: Could not load class of driverClassName com.mysql.jdbc.Driver at com.zaxxer.hikari.HikariConfig.setDriverClassName(HikariConfig.java:330) ... 15 more Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at com.zaxxer.hikari.HikariConfig.setDriverClassName(HikariConfig.java:325)
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