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java.lang.NullPointerException: 	at org.apache.derby.impl.drda.DDMWriter.maxEncodedLength(Unknown Source)	at org.apache.derby.impl.drda.DDMWriter.writeString(Unknown Source)	at org.apache.derby.impl.drda.DRDAConnThread.writeSQLCAGRP(Unknown Source)	at org.apache.derby.impl.drda.DRDAConnThread.writeSQLCARD(Unknown Source)	at org.apache.derby.impl.drda.DRDAConnThread.writeSQLCARDs(Unknown Source)	at org.apache.derby.impl.drda.DRDAConnThread.processCommands(Unknown Source)	at org.apache.derby.impl.drda.DRDAConnThread.run(Unknown Source)