I deployed a new server a few days ago and now I am getting errors with the postgresql authentication provider and plugin. My guacamole-client is cloned from github, tweaked and then compiled. I copied my guac.log below. If I run "git clone --depth 1 --single-branch 1.6.0 ...guacamole-client..." the client will work. If I skip "--depth 1 --single-branch 1.6.0" it does not work. Debug does not give any more useful information.
guac.log 2026-01-15 18:52:17.062 [http-nio-8080-exec-2] ERROR o.a.g.rest.RESTExceptionMapper - An internal error occurred, but did not contain an error message. Enable debug-level logging for details. java.lang.NullPointerException: null at java.base/java.io.Reader.<init>(Reader.java:168) at java.base/java.io.InputStreamReader.<init>(InputStreamReader.java:108) at org.apache.guacamole.rest.patch.PatchRESTService.readResourceAsString(PatchRESTService.java:69) at org.apache.guacamole.rest.patch.PatchRESTService.getPatches(PatchRESTService.java:113) at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103) at java.base/java.lang.reflect.Method.invoke(Method.java:580) at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory.lambda$static$0(ResourceMethodInvocationHandlerFactory.java:52) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:146) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:189) at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:219) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:93) at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:478) at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:400) at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:81) at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:256) at org.glassfish.jersey.internal.Errors$1.call(Errors.java:248) at org.glassfish.jersey.internal.Errors$1.call(Errors.java:244) at org.glassfish.jersey.internal.Errors.process(Errors.java:292) at org.glassfish.jersey.internal.Errors.process(Errors.java:274) at org.glassfish.jersey.internal.Errors.process(Errors.java:244) at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:265) at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:235) at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:684) at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:397) at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:349) at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:379) at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:312) at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:205) at com.google.inject.servlet.ServletDefinition.doServiceImpl(ServletDefinition.java:290) at com.google.inject.servlet.ServletDefinition.doService(ServletDefinition.java:280) at com.google.inject.servlet.ServletDefinition.service(ServletDefinition.java:184) at com.google.inject.servlet.ManagedServletPipeline.service(ManagedServletPipeline.java:89) at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:85) at com.google.inject.servlet.ManagedFilterPipeline.dispatch(ManagedFilterPipeline.java:121) at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:133) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:142) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:166) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:88) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:481) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:83) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:643) at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:763) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:72) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:398) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:939) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1831) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52) at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:973) at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:491) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63) at java.base/java.lang.Thread.run(Thread.java:1583) 2026-01-15 18:52:17.097 [http-nio-8080-exec-4] WARN o.a.g.e.AuthenticationProviderFacade - The "postgresql" authentication provider has encountered an internal error which will halt the authentication process. If this is unexpected or you are the developer of this authentication provider, you may wish to enable debug-level logging. If this is expected and you wish to ignore such failures in the future, please set "skip-if-unavailable: postgresql" within your guacamole.properties. 2026-01-15 18:52:17.098 [http-nio-8080-exec-4] ERROR o.a.g.rest.RESTExceptionMapper - Unexpected internal error: Invalid bound statement (not found): org.apache.guacamole.auth.jdbc.user.UserMapper.selectOne org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): org.apache.guacamole.auth.jdbc.user.UserMapper.selectOne at org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>(MapperMethod.java:229) at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:53) at org.apache.ibatis.binding.MapperProxy.lambda$cachedInvoker$0(MapperProxy.java:96) at java.base/java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1708) at org.apache.ibatis.util.MapUtil.computeIfAbsent(MapUtil.java:36) at org.apache.ibatis.binding.MapperProxy.cachedInvoker(MapperProxy.java:94) at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:86) at jdk.proxy5/jdk.proxy5.$Proxy52.selectOne(Unknown Source) at org.apache.guacamole.auth.jdbc.user.UserService.retrieveAuthenticatedUser(UserService.java:404) at org.apache.guacamole.auth.jdbc.JDBCAuthenticationProviderService.authenticateUser(JDBCAuthenticationProviderService.java:83) at org.apache.guacamole.auth.jdbc.InjectedAuthenticationProvider.authenticateUser(InjectedAuthenticationProvider.java:76) at org.apache.guacamole.extension.AuthenticationProviderFacade.authenticateUser(AuthenticationProviderFacade.java:200) at org.apache.guacamole.rest.auth.AuthenticationService.authenticateUser(AuthenticationService.java:132) at org.apache.guacamole.rest.auth.AuthenticationService.getAuthenticatedUser(AuthenticationService.java:235) at org.apache.guacamole.rest.auth.AuthenticationService.authenticate(AuthenticationService.java:391) at org.apache.guacamole.rest.auth.TokenRESTService.createToken(TokenRESTService.java:174) at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103) at java.base/java.lang.reflect.Method.invoke(Method.java:580) at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory.lambda$static$0(ResourceMethodInvocationHandlerFactory.java:52) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:146) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:189) at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:219) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:93) at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:478) at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:400) at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:81) at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:256) at org.glassfish.jersey.internal.Errors$1.call(Errors.java:248) at org.glassfish.jersey.internal.Errors$1.call(Errors.java:244) at org.glassfish.jersey.internal.Errors.process(Errors.java:292) at org.glassfish.jersey.internal.Errors.process(Errors.java:274) at org.glassfish.jersey.internal.Errors.process(Errors.java:244) at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:265) at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:235) at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:684) at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:397) at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:349) at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:379) at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:312) at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:205) at com.google.inject.servlet.ServletDefinition.doServiceImpl(ServletDefinition.java:290) at com.google.inject.servlet.ServletDefinition.doService(ServletDefinition.java:280) at com.google.inject.servlet.ServletDefinition.service(ServletDefinition.java:184) at com.google.inject.servlet.ManagedServletPipeline.service(ManagedServletPipeline.java:89) at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:85) at com.google.inject.servlet.ManagedFilterPipeline.dispatch(ManagedFilterPipeline.java:121) at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:133) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:142) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:166) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:88) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:481) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:83) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:643) at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:763) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:72) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:398) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:939) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1831) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52) at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:973) at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:491) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63) at java.base/java.lang.Thread.run(Thread.java:1583) Sent with [Proton Mail](https://proton.me/mail/home) secure email.
