Improved shard_conn retries.
Improved shard_conn retries.

xgwubin/vitess,sougou/vitess,SDHM/vitess,AndyDiamondstein/vitess,applift/vitess,mlc0202/vitess,vitessio/vitess,kuipertan/vitess,HubSpot/vitess,mahak/vitess,anusornc/vitess,mlc0202/vitess,kmiku7/vitess-annotated,erzel/vitess,ngaut/vitess,yangzhongj/vitess,HeisenbergUncertain/vitess,cloudbearings/vitess,skyportsystems/vitess,kmiku7/vitess-annotated,netroby/vitess,davygeek/vitess,davygeek/vitess,mattharden/vitess,yaoshengzhe/vitess,cgvarela/vitess,erzel/vitess,dumbunny/vitess,enisoc/vitess,xgwubin/vitess,CERN-Stage-3/vitess,aaijazi/vitess,davygeek/vitess,SDHM/vitess,cloudbearings/vitess,xgwubin/vitess,tjyang/vitess,ngaut/vitess,netroby/vitess,guokeno0/vitess,erzel/vitess,mapbased/vitess,cgvarela/vitess,applift/vitess,sougou/vitess,mahak/vitess,michael-berlin/vitess,applift/vitess,rnavarro/vitess,CERN-Stage-3/vitess,mahak/vitess,skyportsystems/vitess,ptomasroos/vitess,davygeek/vitess,dumbunny/vitess,cloudbearings/vitess,AndyDiamondstein/vitess,HubSpot/vitess,enisoc/vitess,HeisenbergUncertain/vitess,tjyang/vitess,cgvarela/vitess,kmiku7/vitess-annotated,fengshao0907/vitess,erzel/vitess,yaoshengzhe/vitess,anusornc/vitess,mattharden/vitess,tinyspeck/vitess,alainjobart/vitess,vitessio/vitess,yaoshengzhe/vitess,yangzhongj/vitess,enisoc/vitess,ptomasroos/vitess,fengshao0907/vitess,applift/vitess,tjyang/vitess,tirsen/vitess,mattharden/vitess,SDHM/vitess,tjyang/vitess,mlc0202/vitess,mlc0202/vitess,SDHM/vitess,kuipertan/vitess,skyportsystems/vitess,AndyDiamondstein/vitess,netroby/vitess,AndyDiamondstein/vitess,yaoshengzhe/vitess,netroby/vitess,mlc0202/vitess,mapbased/vitess,guokeno0/vitess,yaoshengzhe/vitess,SDHM/vitess,apmichaud/vitess-apm,vitessio/vitess,atyenoria/vitess,ngaut/vitess,tinyspeck/vitess,dumbunny/vitess,pivanof/vitess,cgvarela/vitess,fengshao0907/vitess,anusornc/vitess,cloudbearings/vitess,mattharden/vitess,atyenoria/vitess,tjyang/vitess,nurblieh/vitess,atyenoria/vitess,CERN-Stage-3/vitess,dcadevil/vitess,guokeno0/vitess,cloudbearings/vitess,ngaut/vitess,aaijazi/vitess,apmichaud/vitess-apm,kmiku7/vitess-annotated,rnavarro/vitess,kmiku7/vitess-annotated,ngaut/vitess,kuipertan/vitess,ptomasroos/vitess,alainjobart/vitess,yangzhongj/vitess,SDHM/vitess,yaoshengzhe/vitess,erzel/vitess,ptomasroos/vitess,mattharden/vitess,cgvarela/vitess,alainjobart/vitess,kmiku7/vitess-annotated,netroby/vitess,alainjobart/vitess,applift/vitess,rnavarro/vitess,sougou/vitess,xgwubin/vitess,atyenoria/vitess,erzel/vitess,mlc0202/vitess,applift/vitess,aaijazi/vitess,AndyDiamondstein/vitess,yaoshengzhe/vitess,erzel/vitess,tirsen/vitess,alainjobart/vitess,mahak/vitess,guokeno0/vitess,ptomasroos/vitess,michael-berlin/vitess,AndyDiamondstein/vitess,sougou/vitess,fengshao0907/vitess,erzel/vitess,tjyang/vitess,CERN-Stage-3/vitess,kuipertan/vitess,anusornc/vitess,atyenoria/vitess,anusornc/vitess,HubSpot/vitess,enisoc/vitess,kmiku7/vitess-annotated,tjyang/vitess,ptomasroos/vitess,HubSpot/vitess,michael-berlin/vitess,mahak/vitess,ptomasroos/vitess,xgwubin/vitess,mattharden/vitess,erzel/vitess,vitessio/vitess,yaoshengzhe/vitess,erzel/vitess,mapbased/vitess,tirsen/vitess,skyportsystems/vitess,kuipertan/vitess,nurblieh/vitess,mahak/vitess,xgwubin/vitess,mlc0202/vitess,apmichaud/vitess-apm,aaijazi/vitess,anusornc/vitess,pivanof/vitess,pivanof/vitess,AndyDiamondstein/vitess,tirsen/vitess,atyenoria/vitess,aaijazi/vitess,tjyang/vitess,yangzhongj/vitess,davygeek/vitess,SDHM/vitess,applift/vitess,xgwubin/vitess,SDHM/vitess,alainjobart/vitess,apmichaud/vitess-apm,tirsen/vitess,kmiku7/vitess-annotated,skyportsystems/vitess,mahak/vitess,davygeek/vitess,cloudbearings/vitess,pivanof/vitess,dumbunny/vitess,atyenoria/vitess,pivanof/vitess,pivanof/vitess,nurblieh/vitess,anusornc/vitess,alainjobart/vitess,mlc0202/vitess,HubSpot/vitess,tjyang/vitess,vitessio/vitess,netroby/vitess,mahak/vitess,xgwubin/vitess,davygeek/vitess,michael-berlin/vitess,kuipertan/vitess,mlc0202/vitess,dcadevil/vitess,yangzhongj/vitess,nurblieh/vitess,sougou/vitess,fengshao0907/vitess,cgvarela/vitess,yaoshengzhe/vitess,kuipertan/vitess,HeisenbergUncertain/vitess,mattharden/vitess,guokeno0/vitess,skyportsystems/vitess,enisoc/vitess,michael-berlin/vitess,vitessio/vitess,enisoc/vitess,dumbunny/vitess,yangzhongj/vitess,guokeno0/vitess,AndyDiamondstein/vitess,ptomasroos/vitess,aaijazi/vitess,guokeno0/vitess,sougou/vitess,applift/vitess,ptomasroos/vitess,cloudbearings/vitess,mapbased/vitess,dumbunny/vitess,tinyspeck/vitess,vitessio/vitess,applift/vitess,dcadevil/vitess,HeisenbergUncertain/vitess,pivanof/vitess,mattharden/vitess,rnavarro/vitess,enisoc/vitess,skyportsystems/vitess,vitessio/vitess,cloudbearings/vitess,atyenoria/vitess,michael-berlin/vitess,fengshao0907/vitess,rnavarro/vitess,dcadevil/vitess,mapbased/vitess,cgvarela/vitess,HubSpot/vitess,fengshao0907/vitess,CERN-Stage-3/vitess,tirsen/vitess,rnavarro/vitess,nurblieh/vitess,sougou/vitess,aaijazi/vitess,skyportsystems/vitess,guokeno0/vitess,dcadevil/vitess,pivanof/vitess,yangzhongj/vitess,dumbunny/vitess,skyportsystems/vitess,kmiku7/vitess-annotated,fengshao0907/vitess,mapbased/vitess,tirsen/vitess,fengshao0907/vitess,dumbunny/vitess,pivanof/vitess,alainjobart/vitess,tinyspeck/vitess,michael-berlin/vitess,cgvarela/vitess,tinyspeck/vitess,anusornc/vitess,AndyDiamondstein/vitess,anusornc/vitess,rnavarro/vitess,tinyspeck/vitess,kuipertan/vitess,kuipertan/vitess,tinyspeck/vitess,rnavarro/vitess,mapbased/vitess,dcadevil/vitess,applift/vitess,cloudbearings/vitess,nurblieh/vitess,mattharden/vitess,netroby/vitess,dumbunny/vitess,dumbunny/vitess,atyenoria/vitess,HubSpot/vitess,tirsen/vitess,tirsen/vitess,mapbased/vitess,netroby/vitess,yangzhongj/vitess,nurblieh/vitess,nurblieh/vitess,dcadevil/vitess,HubSpot/vitess,michael-berlin/vitess,SDHM/vitess,netroby/vitess,rnavarro/vitess,xgwubin/vitess,aaijazi/vitess,michael-berlin/vitess,mapbased/vitess,mattharden/vitess,guokeno0/vitess,nurblieh/vitess,sougou/vitess,yangzhongj/vitess,mapbased/vitess,cgvarela/vitess,aaijazi/vitess,apmichaud/vitess-apm