At installation after selection mysql database error appears
Asked by Andreas Sprick:

Hello {#toc-hId-1796101217}
---------------------------

Error: {#toc-hId--756055744}
----------------------------

HTTP Status 500 - Cannot call sendError() after the response has been committed {#toc-hId-986754591}
----------------------------------------------------------------------------------------------------

at the Browser.

What am I doing wrong?

I kept to the installation specifications.

System:

Confluence 6.8.2

mysql 5.7.22

Tomcat 8.051

Server: VM with Ubunt16.04

More error message:

**type** Exception report

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

**description** ++The server encountered an internal error that prevented it from fulfilling this request.++

**exception**

```
java.lang.IllegalStateException: Cannot call sendError() after the response has been committed	org.apache.catalina.connector.ResponseFacade.sendError(ResponseFacade.java:462)	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:729)	com.atlassian.confluence.util.AbstractBootstrapHotSwappingFilter$SwapOnBootstrapFilter.doFilter(AbstractBootstrapHotSwappingFilter.java:55)	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)	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.confluence.util.ClusterHeaderFilter.doFilter(ClusterHeaderFilter.java:56)	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)	org.springframework.orm.hibernate.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:170)	com.atlassian.confluence.web.filter.ConfluenceOpenSessionInViewFilter.doFilterInternal(ConfluenceOpenSessionInViewFilter.java:41)	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$1.doFilter(DelegatingPluginFilter.java:58)	com.atlassian.confluence.extra.webdav.servlet.filter.ReverseProxyFilter.doFilter(ReverseProxyFilter.java:409)	com.atlassian.confluence.extra.webdav.servlet.filter.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:29)	com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:64)	com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:37)	com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:70)	com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:58)	com.atlassian.confluence.tenant.TenantGateFilter.lambda$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:49)	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.web.filter.DebugFilter.doFilter(DebugFilter.java:46)	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)
```

**note** ++The full stack trace of the root cause is available in the Apache Tomcat/8.0.51 logs.++


Answers:
author: Andreas Sprick
body: Dear Ms Worley

I used the corrected manual.

After testing the connection was reported as ok. Then the error message occurs.

Enclosed the configuration files

mysqld.cnf

\[mysqld_safe\]

socket = /var/run/mysqld/mysqld.sock nice = 0

\[mysqld\]

user = mysql

pid-file = /var/run/mysqld/mysqld.pid socket = /var/run/mysqld/mysqld.sock port = 3306 basedir = /usr datadir = /media/DATENBANK-MYSQL/MYSQL tmpdir = /tmp lc-messages-dir = /usr/share/mysql skip-external-locking transaction-isolation = READ-COMMITTED

bind-address = 127.0.0.1

character-set-server = utf8

collation-server =utf8_bin

key_buffer_size = 16M

max_allowed_packet = 256M

thread_stack = 192K

thread_cache_size = 8

myisam-recover-options = BACKUP

query_cache_limit = 1M

query_cache_size = 16M

log_error = /var/log/mysql/error.log

expire_logs_days = 10

max_binlog_size = 100M

default-storage-engine = InnoDB

innodb_log_file_size = 2GB

binlog_format = row

big-tables

confluence.cfg.xml

\<?xml version="1.0" encoding="UTF-8"?\>

\<confluence-configuration\>

\<setupStep\>setupdbchoice-start\</setupStep\>

\<setupType\>custom\</setupType\>

\<buildNumber\>7701\</buildNumber\>

\<properties\>

\<property

name="atlassian.license.message"\>xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx\</property\>

\<property

name="confluence.setup.server.id"\>BC5G-WJ8N-T69M-ZGBP\</property\>

\<property name="confluence.webapp.context.path"\>\</property\>

\<property name="hibernate.c3p0.acquire_increment"\>1\</property\>

\<property name="hibernate.c3p0.idle_test_period"\>100\</property\>

\<property name="hibernate.c3p0.max_size"\>60\</property\>

\<property name="hibernate.c3p0.max_statements"\>0\</property\>

\<property name="hibernate.c3p0.min_size"\>20\</property\>

\<property name="hibernate.c3p0.preferredTestQuery"\>select 1\</property\>

\<property name="hibernate.c3p0.timeout"\>30\</property\>

\<property

name="hibernate.connection.driver_class"\>com.mysql.jdbc.Driver\</property\>

\<property name="hibernate.connection.isolation"\>2\</property\>

\<property name="hibernate.connection.password"\>gerbetmar\</property\>

\<property

name="hibernate.connection.url"\>jdbc:mysql://localhost:3306/confluence\</property\>

\<property name="hibernate.connection.username"\>confluence-1\</property\>

\<property

name="hibernate.dialect"\>com.atlassian.confluence.impl.hibernate.dialect.MySQLDialect\</property\>

Many thanks for your help.

Best regards

Andreas Sprick


author: AnnWorley
body: Please let me know which installation document you are following.

A similar error was recently resolved by reviewing the [MySQL database setup instructions](https://confluence.atlassian.com/display/DOC/Database+Setup+For+MySQL), it turned out the isolation level was not READ-COMMITTED in the configuration file for MySQL but had been set at the command line. [HTTP Status 500 - Cannot call sendError() after the response has been committed](https://community.atlassian.com/t5/Confluence-questions/HTTP-Status-500-Cannot-call-sendError-after-the-response-has/qaq-p/732073#M98471)


Tags: confluence-server

server