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java.lang.NullPointerException: null at net.opentsdb.tsd.HttpSerializer.formatErrorV1(HttpSerializer.java:834)[tsdb-2.3.0-RC1.jar:85047ea] at net.opentsdb.tsd.HttpQuery.badRequest(HttpQuery.java:413)[tsdb-2.3.0-RC1.jar:85047ea] at net.opentsdb.tsd.QueryExecutor$ErrorCB.call(QueryExecutor.java:517)[tsdb-2.3.0-RC1.jar:85047ea]