EM 12c, 13c: OMS Loader Backlog is Increasing and Performance is Poor, Shows Message. LOADER ERROR: ERROR-800|Loader already processing this request (Doc ID 2227148.1)

2017-01-05 11:15:21,738 [GCLoader[severity] - https://<HOSTNAME>.<DOMAIN>:<PORT>/emd/main/] ERROR gcloader.DataLoader logp.251 - LOADER ERROR: Loader already procesing this request: tracking_key=508863.1482899750000 emd_url=https://<HOSTNAME>.<DOMAIN>:<PORT>/emd/main/ loadEntryGuid=405FD31C863B0E5FD8E59DC03846366D upload_type=severity stream_id=1
2017-01-05 11:15:21,740 [GCLoader[severity] - https://<HOSTNAME>.<DOMAIN>:<PORT>/emd/main/] ERROR gcloader.Receiver logp.251 - Upload failed: emdUrl=https://host:3872/emd/main/ trackingKey=508863.1482899750000 type=severity e=ERROR-800|Loader already procesing this request
ERROR-800|Loader already procesing this request
at oracle.sysman.core.pbs.gcloader.DataLoader.startUpload(DataLoader.java:1751)
at oracle.sysman.core.pbs.gcloader.RequestMapper.processAll(RequestMapper.java:122)
at oracle.sysman.core.pbs.gcloader.Receiver.processFile(Receiver.java:2297)
at oracle.sysman.core.pbs.gcloader.Receiver.doPost(Receiver.java:1979)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:301)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at oracle.sysman.core.pbs.app.ContextInitFilter.chain(ContextInitFilter.java:293)
at oracle.sysman.core.pbs.app.ContextInitFilter.doFilter(ContextInitFilter.java:273)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:186)
...