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java.lang.IllegalArgumentException: Not a JSON map: null	at com.datastax.driver.core.SimpleJSONParser.parseStringMap(SimpleJSONParser.java:77)	at com.datastax.driver.core.ColumnMetadata$IndexMetadata.build(ColumnMetadata.java:283)	at com.datastax.driver.core.ColumnMetadata$IndexMetadata.access$000(ColumnMetadata.java:113)	at com.datastax.driver.core.ColumnMetadata.(ColumnMetadata.java:53)	at com.datastax.driver.core.ColumnMetadata.fromRaw(ColumnMetadata.java:57)	at com.datastax.driver.core.TableMetadata.build(TableMetadata.java:168)	at com.datastax.driver.core.Metadata.buildTableMetadata(Metadata.java:187)	at com.datastax.driver.core.Metadata.rebuildSchema(Metadata.java:119)	at com.datastax.driver.core.ControlConnection.refreshSchema(ControlConnection.java:363)	at com.datastax.driver.core.ControlConnection.tryConnect(ControlConnection.java:271)	at com.datastax.driver.core.ControlConnection.reconnectInternal(ControlConnection.java:194)	at com.datastax.driver.core.ControlConnection.connect(ControlConnection.java:82)	at com.datastax.driver.core.Cluster$Manager.init(Cluster.java:1307)	at com.datastax.driver.core.Cluster.init(Cluster.java:159)	at com.datastax.driver.core.Cluster.connect(Cluster.java:249)