HTTP Status 500 - Cannot call sendError() after the response has been committed
Asked by Kazuma Sekiguchi:

I have tried installed confluence in the CentOS6 server.

Install is not correctly because while installing show error message , "HTTP Status 500 - Cannot call sendError() after the response has been committed".  

<http://192.168.3.5:8090/bootstrap/selectsetupstep.action>  
(192.168.3.5 is our local area server's IP Address)  

Please tell me how to correct install it.

Detail:

HTTP????? 500 -- Internal Server Error {#toc-hId-1847078420}
------------------------------------------------------------

*** ** * ** ***

**Type** Exception Report

**?????** Cannot call sendError() after the response has been committed

**??** The server encountered an unexpected condition that prevented it from fulfilling the request.

**??**

```
java.lang.IllegalStateException: Cannot call sendError() after the response has been committed	org.apache.catalina.connector.ResponseFacade.sendError(ResponseFacade.java:456)	javax.servlet.http.HttpServletResponseWrapper.sendError(HttpServletResponseWrapper.java:120)	com.atlassian.confluence.web.filter.DebugFilter$LoggingResponseWrapper.sendError(DebugFilter.java:132)	javax.servlet.http.HttpServletResponseWrapper.sendError(HttpServletResponseWrapper.java:120)	com.atlassian.confluence.servlet.FourOhFourErrorLoggingFilter$1.sendError(FourOhFourErrorLoggingFilter.java:52)	javax.servlet.http.HttpServletResponseWrapper.sendError(HttpServletResponseWrapper.java:120)	com.atlassian.core.filters.HeaderSanitisingResponseWrapper.sendError(HeaderSanitisingResponseWrapper.java:103)	javax.servlet.http.HttpServletResponseWrapper.sendError(HttpServletResponseWrapper.java:120)	javax.servlet.http.HttpServletResponseWrapper.sendError(HttpServletResponseWrapper.java:120)	javax.servlet.http.HttpServletResponseWrapper.sendError(HttpServletResponseWrapper.java:120)	com.atlassian.oauth.serviceprovider.internal.servlet.OAuthFilter$OAuthWWWAuthenticateAddingResponse.sendError(OAuthFilter.java:147)	com.opensymphony.webwork.dispatcher.ServletDispatcher.sendError(ServletDispatcher.java:349)	com.atlassian.confluence.servlet.ConfluenceServletDispatcher.sendError(ConfluenceServletDispatcher.java:104)	com.atlassian.confluence.servlet.ConfluenceServletDispatcher.serviceAction(ConfluenceServletDispatcher.java:97)	com.opensymphony.webwork.dispatcher.ServletDispatcher.service(ServletDispatcher.java:199)	javax.servlet.http.HttpServlet.service(HttpServlet.java:741)	com.atlassian.confluence.util.profiling.ProfilingSiteMeshFilter.doFilter(ProfilingSiteMeshFilter.java:55)	com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:39)	com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:58)	com.atlassian.confluence.util.profiling.ConfluenceActivityFilter.doFilter(ConfluenceActivityFilter.java:39)	com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:64)	com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:37)	com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:58)	com.atlassian.prettyurls.filter.PrettyUrlsCombinedMatchDispatcherFilter.doFilter(PrettyUrlsCombinedMatchDispatcherFilter.java:61)	com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:64)	com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:37)	com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:70)	com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:58)	com.atlassian.johnson.plugin.servlet.filter.JohnsonServletFilterModuleContainerFilter.doFilter(JohnsonServletFilterModuleContainerFilter.java:50)	com.atlassian.confluence.jmx.JmxFilter.doFilter(JmxFilter.java:98)	com.atlassian.confluence.cache.TransactionalCacheFactoryCleanupFilter.doFilter(TransactionalCacheFactoryCleanupFilter.java:22)	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)	com.atlassian.core.filters.ServletContextThreadLocalFilter.doFilter(ServletContextThreadLocalFilter.java:21)	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)	com.atlassian.confluence.util.UserLoggingContextFilter.doFilter(UserLoggingContextFilter.java:32)	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)	com.atlassian.confluence.util.UserNameHeaderFilter.doFilter(UserNameHeaderFilter.java:25)	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)	com.atlassian.confluence.web.filter.MauEventFilter.doFilter(MauEventFilter.java:39)	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)	com.atlassian.confluence.util.UserThreadLocalFilter.doFilter(UserThreadLocalFilter.java:39)	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)	com.atlassian.confluence.web.filter.ConfluenceTimeoutFilter.doFilter(ConfluenceTimeoutFilter.java:57)	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)	com.atlassian.seraph.filter.SecurityFilter.doFilter(SecurityFilter.java:88)	com.atlassian.confluence.web.filter.ConfluenceSecurityFilter.applyFilter(ConfluenceSecurityFilter.java:39)	com.atlassian.confluence.web.filter.ConfluenceSecurityFilter.doFilter(ConfluenceSecurityFilter.java:29)	com.atlassian.confluence.web.filter.ThreadLocalCacheFilter.doFilter(ThreadLocalCacheFilter.java:25)	com.atlassian.security.auth.trustedapps.filter.TrustedApplicationsFilter.doFilter(TrustedApplicationsFilter.java:103)	com.atlassian.confluence.util.AbstractBootstrapHotSwappingFilter.doFilter(AbstractBootstrapHotSwappingFilter.java:35)	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)	com.atlassian.seraph.filter.BaseLoginFilter.doFilter(BaseLoginFilter.java:148)	com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:39)	com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:58)	com.atlassian.oauth.serviceprovider.internal.servlet.OAuthFilter.doFilter(OAuthFilter.java:67)	com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:64)	com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:37)	com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:58)	com.atlassian.prettyurls.filter.PrettyUrlsCombinedMatchDispatcherFilter.doFilter(PrettyUrlsCombinedMatchDispatcherFilter.java:61)	com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:64)	com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:37)	com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:70)	com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:58)	com.atlassian.johnson.plugin.servlet.filter.JohnsonServletFilterModuleContainerFilter.doFilter(JohnsonServletFilterModuleContainerFilter.java:50)	com.atlassian.confluence.util.ClusterHeaderFilter.doFilter(ClusterHeaderFilter.java:56)	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)	com.atlassian.confluence.web.filter.ConfluenceOpenSessionInViewFilter.doFilterInternal(ConfluenceOpenSessionInViewFilter.java:38)	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	com.atlassian.confluence.util.ConfluenceErrorFilter.doFilter(ConfluenceErrorFilter.java:24)	com.atlassian.util.profiling.filters.ProfilingFilter.doFilter(ProfilingFilter.java:99)	com.atlassian.confluence.core.datetime.RequestTimeThreadLocalFilter.doFilter(RequestTimeThreadLocalFilter.java:37)	com.atlassian.core.filters.cache.AbstractCachingFilter.doFilter(AbstractCachingFilter.java:33)	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)	com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:39)	com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:58)	com.atlassian.jwt.internal.servlet.JwtAuthFilter.doFilter(JwtAuthFilter.java:31)	com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:64)	com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:37)	com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:58)	com.atlassian.confluence.web.filter.HttpRequestStatsFilter.doFilter(HttpRequestStatsFilter.java:47)	com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:64)	com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:37)	com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:58)	com.atlassian.gzipfilter.GzipFilter.doFilterInternal(GzipFilter.java:121)	com.atlassian.gzipfilter.GzipFilter.doFilter(GzipFilter.java:92)	com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:64)	com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:37)	com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:58)	com.atlassian.confluence.web.filter.ConfluenceTimingFilter.doFilter(ConfluenceTimingFilter.java:46)	com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:64)	com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:37)	com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:58)	com.atlassian.prettyurls.filter.PrettyUrlsCombinedMatchDispatcherFilter.doFilter(PrettyUrlsCombinedMatchDispatcherFilter.java:61)	com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:64)	com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:37)	com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:58)	com.atlassian.confluence.extra.webdav.servlet.filter.ReverseProxyFilter.doFilter(ReverseProxyFilter.java:409)	com.atlassian.confluence.extra.webdav.servlet.filter.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:29)	com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:64)	com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:37)	com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:70)	com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:58)	com.atlassian.johnson.plugin.servlet.filter.JohnsonServletFilterModuleContainerFilter.doFilter(JohnsonServletFilterModuleContainerFilter.java:50)	com.atlassian.confluence.tenant.TenantGateFilter.lambda$doFilter$0(TenantGateFilter.java:35)	com.atlassian.confluence.tenant.TenantGate$3.call(TenantGate.java:145)	com.atlassian.confluence.tenant.TenantGateFilter.doFilter(TenantGateFilter.java:37)	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)	com.atlassian.confluence.util.MobileAppRequestFilter.doFilter(MobileAppRequestFilter.java:36)	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)	com.atlassian.confluence.internal.web.filter.spring.IgnoreWebAsyncManagerFilter.doFilter(IgnoreWebAsyncManagerFilter.java:59)	com.atlassian.confluence.web.filter.validateparam.RequestParamValidationFilter.doFilter(RequestParamValidationFilter.java:51)	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)	com.atlassian.confluence.web.filter.TranslationModeFilter.doFilter(TranslationModeFilter.java:39)	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)	com.atlassian.confluence.plugin.servlet.filter.ActionContextCleanUp.doFilter(ActionContextCleanUp.java:72)	com.atlassian.confluence.web.filter.LanguageExtractionFilter.doFilter(LanguageExtractionFilter.java:39)	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)	com.atlassian.confluence.impl.vcache.VCacheRequestContextFilter.doFilter(VCacheRequestContextFilter.java:58)	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)	com.atlassian.confluence.util.LoggingContextFilter.doFilter(LoggingContextFilter.java:33)	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)	com.atlassian.confluence.util.RequestCacheThreadLocalFilter.doFilter(RequestCacheThreadLocalFilter.java:65)	com.atlassian.confluence.web.filter.ZipkinTracingFilter.doFilter(ZipkinTracingFilter.java:54)	com.atlassian.confluence.web.filter.ResponseOutputStreamFilter.doFilter(ResponseOutputStreamFilter.java:25)	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)	com.atlassian.confluence.web.ConfluenceJohnsonFilter.doFilter(ConfluenceJohnsonFilter.java:30)	com.atlassian.core.filters.encoding.AbstractEncodingFilter.doFilter(AbstractEncodingFilter.java:41)	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)	com.atlassian.confluence.impl.servlet.HoldingUntilStartedFilter.doFilter(HoldingUntilStartedFilter.java:88)	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)	com.atlassian.core.filters.HeaderSanitisingFilter.doFilter(HeaderSanitisingFilter.java:44)	com.atlassian.confluence.servlet.FourOhFourErrorLoggingFilter.doFilter(FourOhFourErrorLoggingFilter.java:64)	com.atlassian.confluence.internal.diagnostics.HttpRequestMonitoringFilter.doFilter(HttpRequestMonitoringFilter.java:35)	com.atlassian.confluence.web.filter.DebugFilter.doFilter(DebugFilter.java:46)	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)
```

**??** ?????????????????????????????


Answers:
author: Nobuyuki Mukai
body: Sekiguchi??

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comments: author: Nobuyuki Mukai
body: ???????????????????????????????????????

??????[java.net.UnknownHostException exceptions in Confluence log file due to DNS lookups failing](https://confluence.atlassian.com/confkb/java-net-unknownhostexception-exceptions-in-confluence-log-file-due-to-dns-lookups-failing-394465548.html)????????????????????????????????????????

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Tags: confluence-server

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