thanks for your attention,my client version is 2.7.10, server is couchbase-server-enterprise_6.0.2-windows_amd64.msi].it works normally in Initialize and normally at the beginning of 6/7 minutes,after that when i use multi thread ,every thread has different cycle time, when the exeption happens some call getdocument is ok,others fall,but they all use same bucket stored in ClusterHelper，i really don’t know why.The exeption object“/7198b36e_0d7c_4671_8af4_08296fde986b/fmmiypfup+cdh8bmkbetleer_33.rem”(has disconneted or not in server) seems like that in server part some object has been disposed.