In some Jenkins, some builds are getting deleted from job page and unix machine. we suspect it's some issue with open shift sync plugin. from the jenkins log:

{{INFO: onDeleted job/ocp-oc-cd-for-fit/job/ocp-oc-cd-for-fit-oc-cd-ocp/4272/
Jun 27, 2019 7:28:07 AM io.fabric8.jenkins.openshiftsync.JenkinsUtils deleteRun
INFO: Deleting run: ocp-oc-cd-for-fit/ocp-oc-cd-for-fit-oc-cd-ocp #4272
Jun 27, 2019 7:28:07 AM io.fabric8.jenkins.openshiftsync.JenkinsUtils deleteRun
WARNING: Unable to delete run ocp-oc-cd-for-fit/ocp-oc-cd-for-fit-oc-cd-ocp #4272:ocp-oc-cd-for-fit/ocp-oc-cd-for-fit-oc-cd-ocp #4272: /pciuser/tools/jenkins/jenkins-production/jobs/ocp-oc-cd-for-fit/jobs/ocp-oc-cd-for-fit-oc-cd-ocp/builds/4272 looks to have already been deleted; siblings: [4259, 4138, 3351, 4271, 3753, 4277, lastUnstableBuild, 4139, 4276, legacyIds, 4280, 3385, 49, 4260, 3722, lastStableBuild, 4275, lastFailedBuild, 4279, 3220, 3413, 4270, *****4254, lastUnsuccessfulBuild, 3404, 4220, lastSuccessfulBuild, 4215, 4278] Jun 27, 2019 7:28:07 AM io.fabric8.jenkins.openshiftsync.JenkinsUtils deleteRunINFO: Deleting run: ocp-oc-cd-for-fit/ocp-oc-cd-for-fit-oc-cd-ocp #4271INFO: Deleting run: ocp-oc-cd-for-fit/ocp-oc-cd-for-fit-oc-cd-ocp #4270Jun 27, 2019 7:28:51 AM io.fabric8.jenkins.openshiftsync.JenkinsUtils deleteRun*****WARNING: Unable to delete run ocp-oc-cd-for-fit/ocp-oc-cd-for-fit-oc-cd-ocp #4270:ocp-oc-cd-for-fit/ocp-oc-cd-for-fit-oc-cd-ocp #4270: /pciuser/tools/jenkins/jenkins-production/jobs/ocp-oc-cd-for-fit/jobs/ocp-oc-cd-for-fit-oc-cd-ocp/builds/4270 looks to have already been deleted; siblings: [4259, 4138, 3351, 3753, 4277, lastUnstableBuild, 4139, 4276, legacyIds, 4280, 3385, 49, 4260, 3722, lastStableBuild, 4275, lastFailedBuild, 4279, 3220, 3413, 4254, lastUnsuccessfulBuild, 3404, 4220, lastSuccessfulBuild, 4215, 4278]
Jun 27, 2019 7:28:51 AM io.fabric8.jenkins.openshiftsync.BuildWatcher reconcileRunsAndBuilds}}