add connection retry
add connection retry

AndersenLab/cegwas-web,AndersenLab/cegwas-web,AndersenLab/CeNDR,AndersenLab/CeNDR,AndersenLab/cegwas-web,AndersenLab/CeNDR,AndersenLab/cegwas-web,AndersenLab/CeNDR