Indexing stuck in CATCHUP phase after index build

Run: http://qa.sc.couchbase.com/job/cen006-2i-vset03-04-recoverytests-create-index-query-drop-with-kvOps/52/consoleFull

Build index was issued at -

2015-07-02 03:34:34 | INFO | MainProcess | Cluster_Thread | [tuq_helper.run_cbq_query] RUN QUERY BUILD INDEX on default(employeef4547966b502483da58cf2f3c6952b1ajob_title,employeef4547966b502483da58cf2f3c6952b1ajoin_yr) USING GSI
2015-07-02 03:34:34 | INFO | MainProcess | Cluster_Thread | [rest_client.query_tool] query params : statement=BUILD+INDEX+on+default%28employeef4547966b502483da58cf2f3c6952b1ajob_title%2Cemployeef4547966b502483da58cf2f3c6952b1ajoin_yr%29+USING+GSI

However the index is stuck in CATCHUP Phase
Index:default/employeef4547966b502483da58cf2f3c6952b1ajoin_yr, Id:15072750516201237199, Using:forestdb, Exprs:[`join_yr`], isPrimary:false
State:INDEX_STATE_CATCHUP, Error:

On UI, is shows at 100% built but state is still "Building"

Logs:
https://s3-ap-southeast-1.amazonaws.com/indexing-test/Centos_Set3_Job4_52/Centos_Set3_Job4_Run52_Log
https://s3-ap-southeast-1.amazonaws.com/indexing-test/Centos_Set3_Job4_52/collectinfo-2015-07-03T054019-ns_1%40172.23.121.141.zip
https://s3-ap-southeast-1.amazonaws.com/indexing-test/Centos_Set3_Job4_52/collectinfo-2015-07-03T054019-ns_1%40172.23.121.142.zip
https://s3-ap-southeast-1.amazonaws.com/indexing-test/Centos_Set3_Job4_52/collectinfo-2015-07-03T054019-ns_1%40172.23.121.143.zip
https://s3-ap-southeast-1.amazonaws.com/indexing-test/Centos_Set3_Job4_52/collectinfo-2015-07-03T054019-ns_1%40172.23.121.144.zip
https://s3-ap-southeast-1.amazonaws.com/indexing-test/Centos_Set3_Job4_52/collectinfo-2015-07-03T054019-ns_1%40172.23.121.145.zip