We are observingbelow errors in JIRA logs intermittently, Can you please look into this and advise why this would happen
2016-12-22 14:00:15,384 http-nio-8081-exec-22 ERROR ddean 840x203598x1 ut8q3d 66.44.92.115:50692,10.218.4.11 /rest/greenhopper/1.0/xboard/issue/details.json [velocity] Left side ($roles.entrySet().size()) of '>' operation has null value at com.adweb.estimations.estimationUpdate:timeTrackingByRole//templates/com/adweb/estimations/customFields/timeTrackingByRole/edit.vm[line 3, column 44]
2016-12-22 14:00:15,384 http-nio-8081-exec-22 ERROR ddean 840x203598x1 ut8q3d 66.44.92.115:50692,10.218.4.11 /rest/greenhopper/1.0/xboard/issue/details.json [velocity] Left side ($roles.entrySet().size()) of '>' operation has null value at com.adweb.estimations.estimationUpdate:timeTrackingByRole//templates/com/adweb/estimations/customFields/timeTrackingByRole/edit.vm[line 27, column 52]
2016-12-22 14:00:15,384 http-nio-8081-exec-22 ERROR ddean 840x203598x1 ut8q3d 66.44.92.115:50692,10.218.4.11 /rest/greenhopper/1.0/xboard/issue/details.json [velocity] Left side ($roles.entrySet().size()) of '>' operation has null value at com.adweb.estimations.estimationUpdate:timeTrackingByRole//templates/com/adweb/estimations/customFields/timeTrackingByRole/edit.vm[line 226, column 44]
2016-12-22 14:00:59,889 http-nio-8081-exec-25 ERROR ddean 840x203716x6 ut8q3d 66.44.92.115:50692,10.218.4.11 /rest/greenhopper/1.0/xboard/issue/details.json [velocity] Left side ($roles.entrySet().size()) of '>' operation has null value at com.adweb.estimations.estimationUpdate:timeTrackingByRole//templates/com/adweb/estimations/customFields/timeTrackingByRole/edit.vm[line 3, column 44]
2016-12-22 14:00:59,889 http-nio-8081-exec-25 ERROR ddean 840x203716x6 ut8q3d 66.44.92.115:50692,10.218.4.11 /rest/greenhopper/1.0/xboard/issue/details.json [velocity] Left side ($roles.entrySet().size()) of '>' operation has null value at com.adweb.estimations.estimationUpdate:timeTrackingByRole//templates/com/adweb/estimations/customFields/timeTrackingByRole/edit.vm[line 27, column 52]
2016-12-22 14:00:59,889 http-nio-8081-exec-25 ERROR ddean 840x203716x6 ut8q3d 66.44.92.115:50692,10.218.4.11 /rest/greenhopper/1.0/xboard/issue/details.json [velocity] Left side ($roles.entrySet().size()) of '>' operation has null value at com.adweb.estimations.estimationUpdate:timeTrackingByRole//templates/com/adweb/estimations/customFields/timeTrackingByRole/edit.vm[line 226, column 44]
2016-12-22 14:01:18,453 http-nio-8081-exec-25 ERROR ddean 841x203829x1 ut8q3d 66.44.92.115:50692,10.218.4.11 /rest/greenhopper/1.0/xboard/issue/details.json [velocity] Left side ($roles.entrySet().size()) of '>' operation has null value at com.adweb.estimations.estimationUpdate:timeTrackingByRole//templates/com/adweb/estimations/customFields/timeTrackingByRole/edit.vm[line 3, column 44]
2016-12-22 14:01:18,453 http-nio-8081-exec-25 ERROR ddean 841x203829x1 ut8q3d 66.44.92.115:50692,10.218.4.11 /rest/greenhopper/1.0/xboard/issue/details.json [velocity] Left side ($roles.entrySet().size()) of '>' operation has null value at com.adweb.estimations.estimationUpdate:timeTrackingByRole//templates/com/adweb/estimations/customFields/timeTrackingByRole/edit.vm[line 27, column 52]
2016-12-22 14:01:18,453 http-nio-8081-exec-25 ERROR ddean 841x203829x1 ut8q3d 66.44.92.115:50692,10.218.4.11 /rest/greenhopper/1.0/xboard/issue/details.json [velocity] Left side ($roles.entrySet().size()) of '>' operation has null value at com.adweb.estimations.estimationUpdate:timeTrackingByRole//templates/com/adweb/estimations/customFields/timeTrackingByRole/edit.vm[line 226, column 44]
