java.lang.NullPointerException: This exception has no message.

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at com.datastax.driver.core.Metadata.buildTableMetadata(
at com.datastax.driver.core.Metadata.rebuildSchema(
at com.datastax.driver.core.ControlConnection.refreshSchema(
at com.datastax.driver.core.ControlConnection.refreshSchema(
at java.util.concurrent.Executors$
at java.util.concurrent.ThreadPoolExecutor.runWorker(
at java.util.concurrent.ThreadPoolExecutor$

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