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  <channel>
    <title>question Re: Error while enabling Ambari View in Support Questions</title>
    <link>https://community.cloudera.com/t5/Support-Questions/Error-while-enabling-Ambari-View/m-p/119727#M82505</link>
    <description>&lt;P&gt;&lt;A rel="user" href="https://community.cloudera.com/users/3055/nareshjella89.html" nodeid="3055"&gt;@Naresh Jella&lt;/A&gt;&lt;/P&gt;&lt;P&gt;add below property in ambari.properties and re-start ambari-server&lt;/P&gt;&lt;P&gt;client.threadpool.size.max = 50&lt;/P&gt;&lt;P&gt;I hope this will help for you.&lt;/P&gt;</description>
    <pubDate>Thu, 28 Apr 2016 04:48:14 GMT</pubDate>
    <dc:creator>divakarreddy_a</dc:creator>
    <dc:date>2016-04-28T04:48:14Z</dc:date>
    <item>
      <title>Error while enabling Ambari View</title>
      <link>https://community.cloudera.com/t5/Support-Questions/Error-while-enabling-Ambari-View/m-p/119725#M82503</link>
      <description>&lt;P&gt;Hi I am trying to implement ambari view for capacity scheduler, but I am getting the below error.&lt;/P&gt;&lt;P&gt; org.apache.ambari.view.utils.ambari.AmbariApiException: RA040 I/O error while requesting Ambari&lt;/P&gt;&lt;PRE&gt;	at org.apache.ambari.view.utils.ambari.AmbariApi.requestClusterAPI(AmbariApi.java:176)
	at org.apache.ambari.view.utils.ambari.AmbariApi.requestClusterAPI(AmbariApi.java:142)
	at org.apache.ambari.view.capacityscheduler.ConfigurationService.readFromCluster(ConfigurationService.java:290)
	at org.apache.ambari.view.capacityscheduler.ConfigurationService.readClusterInfo(ConfigurationService.java:147)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
	at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ResponseOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:205)
	at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
	at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302)
	at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
	at com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:137)
	at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
	at com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:137)
	at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
	at com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:137)
	at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
	at com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:137)
	at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
	at com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:137)
	at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
	at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
	at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
	at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
	at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1542)
	at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1473)
	at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1419)
	at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1409)
	at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:409)
	at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:540)
	at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:715)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:770)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:684)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1496)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
	at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
	at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
	at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
	at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
	at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
	at org.apache.ambari.server.security.authorization.AmbariAuthorizationFilter.doFilter(AmbariAuthorizationFilter.java:182)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
	at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:150)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
	at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
	at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
	at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:237)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:167)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1467)
	at org.apache.ambari.server.api.MethodOverrideFilter.doFilter(MethodOverrideFilter.java:72)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1467)
	at org.apache.ambari.server.api.AmbariPersistFilter.doFilter(AmbariPersistFilter.java:47)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1467)
	at org.eclipse.jetty.servlets.UserAgentFilter.doFilter(UserAgentFilter.java:82)
	at org.eclipse.jetty.servlets.GzipFilter.doFilter(GzipFilter.java:294)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1467)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:501)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:429)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
	at org.apache.ambari.server.controller.AmbariHandlerList.processHandlers(AmbariHandlerList.java:209)
	at org.apache.ambari.server.controller.AmbariHandlerList.processHandlers(AmbariHandlerList.java:198)
	at org.apache.ambari.server.controller.AmbariHandlerList.handle(AmbariHandlerList.java:145)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
	at org.eclipse.jetty.server.Server.handle(Server.java:370)
	at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:494)
	at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:971)
	at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1033)
	at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:644)
	at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
	at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
	at org.eclipse.jetty.io.nio.SslConnection.handle(SslConnection.java:196)
	at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:696)
	at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:53)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
	at java.lang.Thread.run(Thread.java:744)
Caused by: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
	at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
	at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1884)
	at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:276)
	at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:270)
	at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1341)
	at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:153)
	at sun.security.ssl.Handshaker.processLoop(Handshaker.java:868)
	at sun.security.ssl.Handshaker.process_record(Handshaker.java:804)
	at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1016)
	at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1312)
	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1339)
	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1323)
	at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:563)
	at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185)
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1300)
	at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:468)
	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(HttpsURLConnectionImpl.java:338)
	at org.apache.ambari.server.controller.internal.URLStreamProvider.processURL(URLStreamProvider.java:209)
	at org.apache.ambari.server.view.ViewAmbariStreamProvider.getInputStream(ViewAmbariStreamProvider.java:118)
	at org.apache.ambari.server.view.ViewAmbariStreamProvider.readFrom(ViewAmbariStreamProvider.java:78)
	at org.apache.ambari.view.utils.ambari.URLStreamProviderBasicAuth.readFrom(URLStreamProviderBasicAuth.java:65)
	at org.apache.ambari.view.utils.ambari.AmbariApi.requestClusterAPI(AmbariApi.java:173)
	... 93 more
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
	at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:385)
	at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292)
	at sun.security.validator.Validator.validate(Validator.java:260)
	at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:326)
	at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:231)
	at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:126)
	at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1323)
	... 110 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
	at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:196)
	at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:268)
	at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:380)
	... 116 more&lt;/PRE&gt;</description>
      <pubDate>Thu, 28 Apr 2016 01:46:54 GMT</pubDate>
      <guid>https://community.cloudera.com/t5/Support-Questions/Error-while-enabling-Ambari-View/m-p/119725#M82503</guid>
      <dc:creator>nareshjella89</dc:creator>
      <dc:date>2016-04-28T01:46:54Z</dc:date>
    </item>
    <item>
      <title>Re: Error while enabling Ambari View</title>
      <link>https://community.cloudera.com/t5/Support-Questions/Error-while-enabling-Ambari-View/m-p/119726#M82504</link>
      <description>&lt;P&gt;We have seen a similar error before, I believe you have enabled SSL for Ambari correct? If yes, please make sure you have setup your keystore correctly and re-run &lt;EM&gt;ambari-server setup-security&lt;/EM&gt;&lt;/P&gt;</description>
      <pubDate>Thu, 28 Apr 2016 04:05:49 GMT</pubDate>
      <guid>https://community.cloudera.com/t5/Support-Questions/Error-while-enabling-Ambari-View/m-p/119726#M82504</guid>
      <dc:creator>jstraub</dc:creator>
      <dc:date>2016-04-28T04:05:49Z</dc:date>
    </item>
    <item>
      <title>Re: Error while enabling Ambari View</title>
      <link>https://community.cloudera.com/t5/Support-Questions/Error-while-enabling-Ambari-View/m-p/119727#M82505</link>
      <description>&lt;P&gt;&lt;A rel="user" href="https://community.cloudera.com/users/3055/nareshjella89.html" nodeid="3055"&gt;@Naresh Jella&lt;/A&gt;&lt;/P&gt;&lt;P&gt;add below property in ambari.properties and re-start ambari-server&lt;/P&gt;&lt;P&gt;client.threadpool.size.max = 50&lt;/P&gt;&lt;P&gt;I hope this will help for you.&lt;/P&gt;</description>
      <pubDate>Thu, 28 Apr 2016 04:48:14 GMT</pubDate>
      <guid>https://community.cloudera.com/t5/Support-Questions/Error-while-enabling-Ambari-View/m-p/119727#M82505</guid>
      <dc:creator>divakarreddy_a</dc:creator>
      <dc:date>2016-04-28T04:48:14Z</dc:date>
    </item>
    <item>
      <title>Re: Error while enabling Ambari View</title>
      <link>https://community.cloudera.com/t5/Support-Questions/Error-while-enabling-Ambari-View/m-p/119728#M82506</link>
      <description>&lt;P&gt;if doesn't work try below workaround and it's worked for me:&lt;/P&gt;&lt;P&gt;Under Cluster Configuration, I used Custom and entered the needed parameters instead of using Local Ambari Managed Cluster and the RA040 error is gone.&lt;/P&gt;</description>
      <pubDate>Thu, 28 Apr 2016 04:58:39 GMT</pubDate>
      <guid>https://community.cloudera.com/t5/Support-Questions/Error-while-enabling-Ambari-View/m-p/119728#M82506</guid>
      <dc:creator>divakarreddy_a</dc:creator>
      <dc:date>2016-04-28T04:58:39Z</dc:date>
    </item>
    <item>
      <title>Re: Error while enabling Ambari View</title>
      <link>https://community.cloudera.com/t5/Support-Questions/Error-while-enabling-Ambari-View/m-p/327246#M230031</link>
      <description>&lt;PRE&gt;To resolve the issue, import the Ambari certificates to the Ambari truststore. To import the Ambari certificates, do the following: 

STEP 1: 
Get certificate from ambari-server 
echo | openssl s_client -showcerts -connect &amp;lt;AMBARI_HOst&amp;gt;:&amp;lt;AMBARI_HTTPs_PORT&amp;gt; 2&amp;gt;&amp;amp;1 | sed --quiet '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' &amp;gt; /tmp/ambari_certificate.cr 

STEP 2: 
Get path of ambari trustore and truststore password from Ambari properties 
cat /etc/ambari-server/conf/ambari.properties |grep truststore 

As per your ambari.properties below is the path and password :-
ssl.trustStore.password=refer from ambari.property file
ssl.trustStore.path=/etc/ambari-server/conf/ambari-server-truststore

STEP 3: 
keytool -importcert -file /tmp/ambari_certificate.crt -keystore &amp;lt;keystore-path&amp;gt; 

STEP 4: 
ambari-server restart

&lt;/PRE&gt;</description>
      <pubDate>Mon, 11 Oct 2021 15:28:51 GMT</pubDate>
      <guid>https://community.cloudera.com/t5/Support-Questions/Error-while-enabling-Ambari-View/m-p/327246#M230031</guid>
      <dc:creator>Kartik_Agarwal</dc:creator>
      <dc:date>2021-10-11T15:28:51Z</dc:date>
    </item>
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