Issue on java.util.NoSuchElementException: Pool exhausted [closed]

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I faced this problem when I started my pipeline:

java.lang.RuntimeException: Could not get a private ClassLoader for 'streamsets-datacollector-cdh_5_12-lib', for 'com_streamsets_pipeline_stage_destination_hdfs_HdfsDTarget', active private ClassLoaders='60': java.util.NoSuchElementException: Pool exhausted

Is there workaround for this? Current ClassLoaders value is 60, should I increase it to 100?