https://community.cloudera.com/t5/Support-Questions/Unable-to-determine-server-PID/m-p/176302#M138554 <P>I am trying to install Ambari 2.5.2.0 following the steps indicated in </P><P><U><A href="https://docs.hortonworks.com/HDPDocuments/Ambari-2.5.2.0/bk_ambari-installation/content/ch_Getting_Ready.html">https://docs.hortonworks.com/HDPDocuments/Ambari-2.5.2.0/bk_ambari-installation/content/ch_Getting_Ready.html</A></U></P><P>I use Ubuntu 14 My Internet access is through a proxy and I tried the following two configurations: embedded PostgreSQL, and a standalone PostgreSQL. In both cases, I have the same error when I start Ambari server. The error message displayed on the screen is the following:</P><P><EM>Server PID at: /var/run/ambari-server/ambari-server.pid Server out at: /var/log/ambari-server/ambari-server.out Server log at: /var/log/ambari-server/ambari-server.log Waiting for server start.........Unable to determine server PID. Retrying... ......Unable to determine server PID. Retrying... ......Unable to determine server PID. Retrying... </EM></P><P> <EM>ERROR: Exiting with exit code -1. REASON: Ambari Server java process died with exitcode 1. Check /var/log/ambari-server/ambari-server.out for more information.</EM></P><P>Please, do you have any idea of the origin of the problem?</P><P>The content of ambari-server.out file is the following:</P><P>Exception in thread "main" com.google.inject.CreationException: Guice creation errors:</P><P>1) Error injecting constructor, java.lang.RuntimeException: Error while creating database accessor </P><P> at org.apache.ambari.server.orm.DBAccessorImpl.&lt;init&gt;(DBAccessorImpl.java:87)</P><P> at org.apache.ambari.server.orm.DBAccessorImpl.class(DBAccessorImpl.java:75)</P><P> while locating org.apache.ambari.server.orm.DBAccessorImpl</P><P> while locating org.apache.ambari.server.orm.DBAccessor</P><P> for field at org.apache.ambari.server.orm.dao.DaoUtils.dbAccessor(DaoUtils.java:36)</P><P> at org.apache.ambari.server.orm.dao.DaoUtils.class(DaoUtils.java:36)</P><P> while locating org.apache.ambari.server.orm.dao.DaoUtils</P><P> for field at org.apache.ambari.server.orm.dao.UserDAO.daoUtils(UserDAO.java:45)</P><P> at org.apache.ambari.server.orm.dao.UserDAO.class(UserDAO.java:45)</P><P> while locating org.apache.ambari.server.orm.dao.UserDAO</P><P> for field at org.apache.ambari.server.controller.internal.ActiveWidgetLayoutResourceProvider.userDAO(ActiveWidgetLayoutResourceProvider.java:61)</P><P>Caused by: java.lang.RuntimeException: Error while creating database accessor </P><P> at org.apache.ambari.server.orm.DBAccessorImpl.&lt;init&gt;(DBAccessorImpl.java:120)</P><P> at org.apache.ambari.server.orm.DBAccessorImpl$$FastClassByGuice$$86dbc63e.newInstance(&lt;generated&gt;)</P><P> at com.google.inject.internal.cglib.reflect.$FastConstructor.newInstance(FastConstructor.java:40)</P><P> at com.google.inject.internal.DefaultConstructionProxyFactory$1.newInstance(DefaultConstructionProxyFactory.java:60)</P><P>......</P> Sat, 28 Oct 2017 20:58:47 GMT unes_s 2017-10-28T20:58:47Z