WVS Publishing failed with error wt.util.WTException: Http Request failed <windchill_hostname> response code is 503.

• Publishing failed when Security Label in place with error below:

date/time TRACE [PublisherQueue1.PollingThread] wt.wvs.loader.EDRLoader Administrator - secure content upload started for - 8252008.jpg
date/time ERROR [PublisherQueue1.PollingThread] wt.fv.uploadtocache Administrator - wt.util.WTException: Http Request failed: https://<hostname.domain>/Windchill/servlet/WindchillGW/wt.fv.uploadtocache.DoUploadToCache_Server/doUploadToCache_Master?mk=wt.fv.uploadtocache.DoUploadToCache_Server&VaultId=631201&FolderId=273076127&SSC=2&CheckSum=9423264&sT=1673024066&sign=2WKwT2JK%2BbcBzSAIErEPLJ6GNyUazH8GReUVuvMKy6U%3D&site=https%3A%2F%2F<hostname.domain>%2FWindchill%2Fservlet%2FWindchillGW&AUTH_CODE=HmacSHA256&isProxy=true&UploadInChunks=true;
Response code is 503
    at wt.fv.uploadtocache.DoUploadToCache_Client.chunk_Upload(DoUploadToCache_Client.java:545)
    at wt.fv.uploadtocache.DoUploadToCache_Client.chunk_doUploadToCache_Client(DoUploadToCache_Client.java:397)
    at wt.fv.uploadtocache.DoUploadToCache_Client.doUploadToCache_Client(DoUploadToCache_Client.java:613)
    at wt.fv.uploadtocache.DoUploadToCache_Client.doUploadToChache_Client(DoUploadToCache_Client.java:592)
    at wt.fv.uploadtocache.UploadToCacheHelper.doUploadToCache(UploadToCacheHelper.java:296)
    at com.ptc.wvs.server.loader.EDRLoader$LoadEntry.secureContentUpload(EDRLoader.java:2785)
    at com.ptc.wvs.server.loader.EDRLoader$LoadEntry.store(EDRLoader.java:2755)
    at com.ptc.wvs.server.loader.EDRLoader$LoadMap.storeThumbnail(EDRLoader.java:3306)
    at com.ptc.wvs.server.loader.EDRLoader.start(EDRLoader.java:1248)
    at com.ptc.wvs.server.publish.PublishHelper.storeRepresentation(PublishHelper.java:532)
    at com.ptc.wvs.server.publish.PublishHelper.storeRepresentation(PublishHelper.java:486)
    at com.ptc.wvs.server.publish.ConvertDocument.storeDocumentRepresentation(ConvertDocument.java:458)
    at com.ptc.wvs.server.publish.ConvertDocument.publishDocument(ConvertDocument.java:222)
    at com.ptc.wvs.server.publish.PublishJob.publishPreconvertedData1(PublishJob.java:2401)
    at com.ptc.wvs.server.publish.PublishJob.publishPreconvertedData(PublishJob.java:2325)
    at com.ptc.wvs.server.publish.PublishJob.executePublishJob(PublishJob.java:1117)
    at com.ptc.wvs.server.publish.PublishJob.processJob(PublishJob.java:843)
    at com.ptc.wvs.server.publish.WVSProcessingJob.doMyJob(WVSProcessingJob.java:1789)
    at com.ptc.wvs.server.publish.WVSProcessingJob.doJobInternal(WVSProcessingJob.java:752)
    at com.ptc.wvs.server.publish.WVSProcessingJob.doJob(WVSProcessingJob.java:722)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at wt.queue.QueueEntry.execute(QueueEntry.java:231)
    at wt.queue.ProcessingQueue.execEntry(ProcessingQueue.java:312)
    at wt.queue.ProcessingQueue.execEntries(ProcessingQueue.java:898)

• Affecting Publishing failure whenever, Windchill PDMLink configured as Cluster and Security Labels is in place.