org.quartz.SchedulerConfigException: Unable to instantiate class load helper class: org.quartz.simpl.CascadingClassLoadHelper cannot be cast to org.quartz.spi.ClassLoadHelper [See nested exception: java.lang.ClassCastException: org.quartz.simpl.CascadingClassLoadHelper cannot be cast to org.quartz.spi.ClassLoadHelper]

Stack Overflow | Roland | 4 years ago
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    Stack Overflow | 4 years ago | Roland
    org.quartz.SchedulerConfigException: Unable to instantiate class load helper class: org.quartz.simpl.CascadingClassLoadHelper cannot be cast to org.quartz.spi.ClassLoadHelper [See nested exception: java.lang.ClassCastException: org.quartz.simpl.CascadingClassLoadHelper cannot be cast to org.quartz.spi.ClassLoadHelper]
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    org.quartz.SchedulerConfigException: Failure occured during job recovery. [See nested exception: org.quartz.JobPersistenceException: Failed to obtain DB connection from data source 'cemdb': java.sql.SQLException: Can't allocate JDBC connection [See nested exception: java.sql.SQLException: Can't allocate JDBC connection]]
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    org.quartz.SchedulerConfigException: Failure occured during job recovery. [See nested exception: org.quartz.JobPersistenceException: Failed to obtain DB connection from data source 'myDS': java.sql.SQLException: Could not retrieve datasource via JNDI url 'java:comp/env/jdbc/Quartz' org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (socket creation error) [See nested exception: java.sql.SQLException: Could not retrieve datasource via JNDI url 'java:comp/env/jdbc/Quartz' org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (socket creation error)]]
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    Root Cause Analysis

    1. java.lang.ClassCastException

      org.quartz.simpl.CascadingClassLoadHelper cannot be cast to org.quartz.spi.ClassLoadHelper

      at org.quartz.impl.StdSchedulerFactory.instantiate()
    2. quartz
      StdSchedulerFactory.instantiate
      1. org.quartz.impl.StdSchedulerFactory.instantiate(StdSchedulerFactory.java:703)
      1 frame