Seeing a lot of "Error Closing query" when server restarts

21 May 2015 06:05:51,518 [main] INFO  org.glassfish.jersey.server.ApplicationHandler  - Initiating Jersey application, version Jersey: 2.3.1 2013-09-27 07:50:09...
21 May 2015 06:05:51,546 [QueryPurger] INFO  org.apache.lens.server.query.QueryExecutionServiceImpl  - Purging: ff5a8c52-a5e9-4799-a570-46aa9070e4db
21 May 2015 06:05:51,547 [QueryPurger] INFO  org.apache.lens.server.query.QueryExecutionServiceImpl  - Query purged: ff5a8c52-a5e9-4799-a570-46aa9070e4db
21 May 2015 06:05:51,547 [QueryPurger] INFO  org.apache.lens.driver.hive.HiveDriver  - FetchResultSet: 2d1e18b9-6c39-4004-ad53-861a71acd9b9
21 May 2015 06:05:51,547 [QueryPurger] ERROR org.apache.lens.server.query.QueryExecutionServiceImpl  - Error closing  query
org.apache.lens.api.LensException: Query not found 2d1e18b9-6c39-4004-ad53-861a71acd9b9
        at org.apache.lens.driver.hive.HiveDriver.getHiveHandle(HiveDriver.java:909)
        at org.apache.lens.driver.hive.HiveDriver.createResultSet(HiveDriver.java:799)
        at org.apache.lens.driver.hive.HiveDriver.fetchResultSet(HiveDriver.java:657)
        at org.apache.lens.server.query.QueryExecutionServiceImpl.getResultset(QueryExecutionServiceImpl.java:1272)
        at org.apache.lens.server.query.QueryExecutionServiceImpl.access$2000(QueryExecutionServiceImpl.java:80)
        at org.apache.lens.server.query.QueryExecutionServiceImpl$QueryPurger.run(QueryExecutionServiceImpl.java:784)
        at java.lang.Thread.run(Thread.java:745)
21 May 2015 06:05:51,547 [QueryPurger] ERROR org.apache.lens.server.query.QueryExecutionServiceImpl  - Error closing  query
org.apache.lens.api.LensException: Query not found:3ee7fc59-fcf6-406e-b057-dba8669aefc3
        at org.apache.lens.driver.jdbc.JDBCDriver.getQueryContext(JDBCDriver.java:490)
        at org.apache.lens.driver.jdbc.JDBCDriver.fetchResultSet(JDBCDriver.java:949)
        at org.apache.lens.server.query.QueryExecutionServiceImpl.getResultset(QueryExecutionServiceImpl.java:1272)
        at org.apache.lens.server.query.QueryExecutionServiceImpl.access$2000(QueryExecutionServiceImpl.java:80)
        at org.apache.lens.server.query.QueryExecutionServiceImpl$QueryPurger.run(QueryExecutionServiceImpl.java:784)
        at java.lang.Thread.run(Thread.java:745)
21 May 2015 06:05:51,547 [QueryPurger] INFO  org.apache.lens.driver.hive.HiveDriver  - FetchResultSet: bad8bf40-4d9f-4f4e-8233-c9e21fdfd405
21 May 2015 06:05:51,547 [QueryPurger] ERROR org.apache.lens.server.query.QueryExecutionServiceImpl  - Error closing  query
org.apache.lens.api.LensException: Query not found bad8bf40-4d9f-4f4e-8233-c9e21fdfd405
        at org.apache.lens.driver.hive.HiveDriver.getHiveHandle(HiveDriver.java:909)
        at org.apache.lens.driver.hive.HiveDriver.createResultSet(HiveDriver.java:799)
        at org.apache.lens.driver.hive.HiveDriver.fetchResultSet(HiveDriver.java:657)
        at org.apache.lens.server.query.QueryExecutionServiceImpl.getResultset(QueryExecutionServiceImpl.java:1272)
        at org.apache.lens.server.query.QueryExecutionServiceImpl.access$2000(QueryExecutionServiceImpl.java:80)
        at org.apache.lens.server.query.QueryExecutionServiceImpl$QueryPurger.run(QueryExecutionServiceImpl.java:784)