Shinyproxy: [Laporan Bug] AJAX error 503 (Layanan Tidak Tersedia) di ShinyProxy (versi 2.3.0)

Dalam versi rilis baru (2.3.0) dari ShinyProxy, semua Aplikasi yang menggunakan DT dengan mode pemrosesan server akan rusak. Peramban mengeluh kesalahan Ajax sementara alat pemrogram peramban mengatakan "jquery.min.js:4 POST http://myip/app_direct/retire/session/cbc7bf01da3a023b6db378384c240836/dataobj/shiny_table?w=&nonce=22377961e7fd2317 503)" (Layanan Tidak Tersedia

kotak peringatan sebagai bellow:
saya
Peringatan DataTables: id tabel = DataTables_Table_0 - Kesalahan Ajax. Untuk informasi lebih lanjut tentang kesalahan ini, silakan lihat http://datatables.net/tn/7

seperti https://github.com/openanalytics/shinyproxy/issues/140

lingkungan saya:
OS: Ubuntu Ubuntu 18.04.3 LTS
otentikasi: keycloak 7.0.0
ReverseProxy: Nginx
Contoh-Aplikasi-mengkilap:

perpustakaan (mengkilap)
perpustakaan (DT)

ui <- fluidPage(DT::dataTableOutput('tbl'))
server <- fungsi(masukan, keluaran, sesi) {
output$tbl <- DT::renderDataTable(data.frame(Col_1=c(1:10), Col_2=c(11:20)))
}
mengkilapApp(ui, server)

Mesin yang sama persis (pengaturan docker,shinyproxy,nginx) dengan auth atau ldap sederhana di application.yml berjalan tanpa masalah.

mengkilapproxy.log seperti di bawah ini:
28-08-2019 11:46:21.991 INFO 14337 --- [XNIO-2 task-3] eocontainerproxy.service.UserService : Pengguna masuk [pengguna: test1]
28-08-2019 11:46:25.142 INFO 14337 --- [XNIO-2 task-6] csdocker.client.DefaultDockerClient : Memulai container dengan Id: f24f391a707d19228f5e97da1e7f8e271230760e91bee2898f454b0bddd0f15a
28-08-2019 11:46:28.068 INFO 14337 --- [XNIO-2 task-6] eocontainerproxy.service.ProxyService : Proxy diaktifkan [pengguna: test1] [spesifikasi: pensiun] [id: 4199b4a8-60dd-43e7- ad8e-0bfac025cc76]
28-08-2019 11:46:28.828 ERROR 14337 --- [XNIO-2 I/O-3] io.undertow.proxy : UT005028: Permintaan proxy ke /proxy_endpoint/4199b4a8-60dd-43e7-ad8e-0bfac025cc76/session /4fba467e8b4976c85ad4be80ee538d7d/dataobj/shiny_table gagal

io.undertow.server.TruncatedResponseException: null
di io.undertow.client.http.HttpRequestConduit.truncateWrites(HttpRequestConduit.java:711) ~[undertow-core-1.4.22.Final.jar!/:1.4.22.Final]
di io.undertow.conduits.AbstractFixedLengthStreamSinkConduit.terminateWrites(AbstractFixedLengthStreamSinkConduit.java:256) ~[undertow-core-1.4.22.Final.jar!/:1.4.22.Final]
di org.xnio.conduits.ConduitStreamSinkChannel.shutdownWrites(ConduitStreamSinkChannel.java:178) ~[xnio-api-3.3.8.Final.jar!/:3.3.8.Final]
di io.undertow.channels.DetachableStreamSinkChannel.shutdownWrites(DetachableStreamSinkChannel.java:79) ~[undertow-core-1.4.22.Final.jar!/:1.4.22.Final]
di io.undertow.server.handlers.proxy.ProxyHandler$HTTPTrailerChannelListener.handleEvent(ProxyHandler.java:754) ~[undertow-core-1.4.22.Final.jar!/:1.4.22.Final]
di io.undertow.server.handlers.proxy.ProxyHandler$ProxyAction$1.completed(ProxyHandler.java:646) [undertow-core-1.4.22.Final.jar!/:1.4.22.Final]
di io.undertow.server.handlers.proxy.ProxyHandler$ProxyAction$1.completed(ProxyHandler.java:561) [undertow-core-1.4.22.Final.jar!/:1.4.22.Final]
di io.undertow.client.http.HttpClientExchange.invokeReadReadyCallback(HttpClientExchange.java:212) [undertow-core-1.4.22.Final.jar!/:1.4.22.Final]
di io.undertow.client.http.HttpClientConnection.initiateRequest(HttpClientConnection.java:410) [undertow-core-1.4.22.Final.jar!/:1.4.22.Final]
di io.undertow.client.http.HttpClientConnection.sendRequest(HttpClientConnection.java:343) [undertow-core-1.4.22.Final.jar!/:1.4.22.Final]
di io.undertow.server.handlers.proxy.ProxyHandler$ProxyAction.run(ProxyHandler.java:561) [undertow-core-1.4.22.Final.jar!/:1.4.22.Final]
di io.undertow.util.SameThreadExecutor.execute(SameThreadExecutor.java:35) [undertow-core-1.4.22.Final.jar!/:1.4.22.Final]
di io.undertow.server.HttpServerExchange.dispatch(HttpServerExchange.java:815) [undertow-core-1.4.22.Final.jar!/:1.4.22.Final]
di io.undertow.server.handlers.proxy.ProxyHandler$ProxyClientHandler.completed(ProxyHandler.java:316) [undertow-core-1.4.22.Final.jar!/:1.4.22.Final]
di io.undertow.server.handlers.proxy.ProxyHandler$ProxyClientHandler.completed(ProxyHandler.java:290) [undertow-core-1.4.22.Final.jar!/:1.4.22.Final]
di io.undertow.server.handlers.proxy.ProxyConnectionPool.connectionReady(ProxyConnectionPool.java:338) [undertow-core-1.4.22.Final.jar!/:1.4.22.Final]
di io.undertow.server.handlers.proxy.ProxyConnectionPool.connect(ProxyConnectionPool.java:525) [undertow-core-1.4.22.Final.jar!/:1.4.22.Final]
di io.undertow.server.handlers.proxy.LoadBalancingProxyClient.getConnection(LoadBalancingProxyClient.java:301) [undertow-core-1.4.22.Final.jar!/:1.4.22.Final]
di eu.openanalytics.containerproxy.util.ProxyMappingManager$1.getConnection(ProxyMappingManager.java:88) [containerproxy-0.8.3.jar!/:0.8.3]
di io.undertow.server.handlers.proxy.ProxyHandler$ProxyClientHandler.run(ProxyHandler.java:310) [undertow-core-1.4.22.Final.jar!/:1.4.22.Final]
di org.xnio.nio.WorkerThread.safeRun(WorkerThread.java:582) [xnio-nio-3.3.8.Final.jar!/:3.3.8.Final]
di org.xnio.nio.WorkerThread.run(WorkerThread.java:466) [xnio-nio-3.3.8.Final.jar!/:3.3.8.Final]