How to increase Read time out value from Ambari stand alone view server to Ambari main server Stand alone Ambari view server makes below call to fetch configurations from Remote server. http://REMOTEAMBARI:8080/api/v1/clusters/CLUSTER_NAME?fields=services/ServiceInfo,hosts,Clusters If this takes more than 10 seconds you will be exception in the logs. because of that non of the views would work. Caused by: java.net.SocketTimeoutException: Read timed out at java.net.SocketInputStream.socketRead0(Native Method) at java.net.SocketInputStream.socketRead(SocketInputStream.java:116) at java.net.SocketInputStream.read(SocketInputStream.java:170) at java.net.SocketInputStream.read(SocketInputStream.java:141) at java.io.BufferedInputStream.fill(BufferedInputStream.java:246) at java.io.BufferedInputStream.read1(BufferedInputStream.java:286) at java.io.BufferedInputStream.read(BufferedInputStream.java:345) at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:704) at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:647) at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1536) at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1441) at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480) at org.apache.ambari.server.controller.internal.URLStreamProvider.processURL(URLStreamProvider.java:218) at org.apache.ambari.server.controller.internal.URLStreamProvider.processURL(URLStreamProvider.java:142) at org.apache.ambari.server.view.RemoteAmbariStreamProvider.readFrom(RemoteAmbariStreamProvider.java:67) at org.apache.ambari.server.view.RemoteAmbariCluster.readFromUrlJSON(RemoteAmbariCluster.java:297) at org.apache.ambari.server.view.RemoteAmbariCluster.access$000(RemoteAmbariCluster.java:51) at org.apache.ambari.server.view.RemoteAmbariCluster$1.load(RemoteAmbariCluster.java:83) at org.apache.ambari.server.view.RemoteAmbariCluster$1.load(RemoteAmbariCluster.java:80) at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3524) at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2317) ... 109 more Add the below configuration in Remote/Main Ambari server /etc/ambari-server/conf/ambari.properties file. please note that this needs Ambari-server restart. views.request.read.timeout.millis=20000 Note: This is tried and tested in Ambari-2.5.0.3 version ... View more

some times if you run some curl calls expecting to fix some other issues - it may turn out to that Ambari UI does not even load the UI. Running the below call would fix the issue and load the UI. curl -u admin:admin -i -H 'X-Requested-By: ambari' -X POST -d '{"wizard-data":"{\"userName\":\"admin\",\"controllerName\":\"\"}"}'http://AMBARIHOST:8080/api/v1/persist Note: Please note that these call should run with caution. contact Hortonworks support team. This is tried and tested with Ambari-2.4.x ... View more

Steps to enable Trace logging in Ambari server for Oracle Database. Step1: 1. Download ojdbc6_g.jar from Oracle JDBC driver trace jar and copy to /usr/share/java and make sure to have correct permissions. Note: take out the actual ojdbc.jar from the location. 2.Create /etc/ambari-server/conf/oracle.properties .level=ALL oracle.jdbc.level=INFO oracle.jdbc.handlers=java.util.logging.ConsoleHandler java.util.logging.ConsoleHandler.level=INFO java.util.logging.ConsoleHandler.formatter=java.util.logging.SimpleFormatter 3. Add "-Doracle.jdbc.Trace=true -Djava.util.logging.config.file=/etc/ambari-server/conf/oracle.properties" property in /var/lib/ambari-server/ambari-env.sh export AMBARI_JVM_ARGS=$AMBARI_JVM_ARGS' -Xms512m -Xmx2048m -XX:MaxPermSize=128m -Djava.security.auth.login.config=$ROOT/etc/ambari-server/conf/krb5JAASLogin.conf -Djav to export AMBARI_JVM_ARGS=$AMBARI_JVM_ARGS' -Xms512m -Xmx2048m -XX:MaxPermSize=128m -Doracle.jdbc.Trace=true -Djava.util.logging.config.file=/etc/ambari-server/conf/oracle.properties -Djava.security.auth.login.config=$ROOT/etc/ambari-server/conf/krb5JAASLogin.conf -Djav After restart you will see logs being written to jdbc.log file ... View more