Hello @Shelton Thank you for your reply, I installed Ambari-2.7.3.0 and the problem is solved ... View more

Hello @Shelton  I reinstall the environment in Centos 7.5 but I have the same problem what is the issue can be with python version ( when you said : I also see an error  NetUtil.py:89 - SSLError: Failed to connect.  That is due to python version)  ... View more

Hello @Shelton thank for this reply, a sad news that my OS version "CentOS Linux release 7.7.1908 (Core)", so what is the solution ( downgrade the OS but how ?) ... View more

Hello @Shelton  and @Shelton  thank you for your help, changing java version didn't give a result , in my ambari-server.log I have this warning, is it may be have a relation with the agent registration ?:  The error:  25 Nov 2019 13:01:04,738 WARN [ambari-client-thread-28] nio:720 - javax.net.ssl.SSLException: Received fatal alert: certificate_unknow   ... View more

Hello @Shelton , thank you for your reply, I'm trying to change the version of java according to steps that you gave for me but I have a problem with the file jdk-8u144-linux-x64.tar.gz :  This is the error : ( I think the problem in the file ?? I trying other links but there are no links valid  [root@ambari opt]# tar xzf jdk-8u144-linux-x64.tar.gz gzip: stdin: not in gzip format tar: Child returned status 1 tar: Error is not recoverable: exiting now [root@ambari opt]#   ... View more

Hello @Shelton Yes the problem persists, any solutions please, I think the java version is causing this issue but I don't know how to change it  ... View more

Hello @sagarshimpi thank you for your reply, you find below information that you recommended, Sorry for been late to reply I reinstall all from beginning but I have the same issue: [root@ambari ~]# java -version openjdk version "1.8.0_232" OpenJDK Runtime Environment (build 1.8.0_232-b09) OpenJDK 64-Bit Server VM (build 25.232-b09, mixed mode)    [root@ambari ~]# ls -ltr `which java` lrwxrwxrwx 1 root root 22 Nov 18 13:33 /usr/bin/java -> /etc/alternatives/java   [root@ambari /]# /usr/sbin/alternatives --config java There is 1 program that provides 'java'. Selection Command ----------------------------------------------- *+ 1 java-1.8.0-openjdk.x86_64 (/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.232.b09-0.el7_7.x86_64/jre/bin/java) Enter to keep the current selection[+], or type selection number: [root@ambari /]# rpm -qa |grep openssl openssl-1.0.2k-19.el7.x86_64 xmlsec1-openssl-1.2.20-7.el7_4.x86_64 openssl-libs-1.0.2k-19.el7.x86_64   [root@ambari /]# rpm -qa |grep ambari ambari-metrics-grafana-2.4.0.1-1.x86_64 ambari-metrics-monitor-2.4.0.1-1.x86_64 ambari-metrics-hadoop-sink-2.4.0.1-1.x86_64 ambari-metrics-collector-2.4.0.1-1.x86_64 ambari-agent-2.4.0.1-1.x86_64 ambari-server-2.4.0.1-1.x86_64   [root@ambari /]# telnet ambari.server 8440 Trying 192.168.253.45... Connected to ambari.server. Escape character is '^]'. ambari-agent.log WARNING 2019-11-24 11:57:11,522 NetUtil.py:116 - Server at <a href="https://ambari.server:8440" target="_blank">https://ambari.server:8440</a> is not reachable, sleeping for 10 seconds... INFO 2019-11-24 11:57:21,522 NetUtil.py:62 - Connecting to <a href="https://ambari.server:8440/ca" target="_blank">https://ambari.server:8440/ca</a> ERROR 2019-11-24 11:57:21,527 NetUtil.py:88 - EOF occurred in violation of protocol (_ssl.c:618) ERROR 2019-11-24 11:57:21,527 NetUtil.py:89 - SSLError: Failed to connect. Please check openssl library versions. Refer to: <a href="https://bugzilla.redhat.com/show_bug.cgi?id=1022468" target="_blank">https://bugzilla.redhat.com/show_bug.cgi?id=1022468</a> for more details. WARNING 2019-11-24 11:57:21,528 NetUtil.py:116 - Server at <a href="https://ambari.server:8440" target="_blank">https://ambari.server:8440</a> is not reachable, sleeping for 10 seconds... INFO 2019-11-24 11:57:31,528 NetUtil.py:62 - Connecting to <a href="https://ambari.server:8440/ca" target="_blank">https://ambari.server:8440/ca</a> ERROR 2019-11-24 11:57:31,533 NetUtil.py:88 - EOF occurred in violation of protocol (_ssl.c:618) ERROR 2019-11-24 11:57:31,534 NetUtil.py:89 - SSLError: Failed to connect. Please check openssl library versions. Refer to: <a href="https://bugzilla.redhat.com/show_bug.cgi?id=1022468" target="_blank">https://bugzilla.redhat.com/show_bug.cgi?id=1022468</a> for more details. WARNING 2019-11-24 11:57:31,534 NetUtil.py:116 - Server at <a href="https://ambari.server:8440" target="_blank">https://ambari.server:8440</a> is not reachable, sleeping for 10 seconds... ... View more

Hello @sagarshimpi  Thank you for your reply I try this solution but the problem persists. ... View more

Hello @Shelton  thank you for your reply and sorry for my late reply you find below all clarification that you recommended:   [root@ambari ~]# hostname -f ambari.server  Python version:  (I have a lot a python version installed) [root@ambari ~]# python -V Python 2.7.5 [root@ambari ~]# vi /etc/python/cert-verification.cfg # Possible values are: # 'enable' to ensure HTTPS certificate verification is enabled by default # 'disable' to ensure HTTPS certificate verification is disabled by default # 'platform_default' to delegate the decision to the redistributor providing this particular Python version # For more info refer to <a href="https://www.python.org/dev/peps/pep-0493/" target="_blank">https://www.python.org/dev/peps/pep-0493/</a> [https] verify=disable ~  ambari.properties file:  agent.package.install.task.timeout=1800 agent.stack.retry.on_repo_unavailability=false agent.stack.retry.tries=5 agent.task.timeout=900 agent.threadpool.size.max=120 ambari-server.user=root ambari.python.wrap=ambari-python-wrap api.ssl=true bootstrap.dir=/var/run/ambari-server/bootstrap bootstrap.script=/usr/lib/python2.6/site-packages/ambari_server/bootstrap.py bootstrap.setup_agent.script=/usr/lib/python2.6/site-packages/ambari_server/setupAgent.py check_database_skipped=false client.api.ssl.cert_name=https.crt client.api.ssl.key_name=https.key client.api.ssl.port=8443 client.threadpool.size.max=25 common.services.path=/var/lib/ambari-server/resources/common-services custom.action.definitions=/var/lib/ambari-server/resources/custom_action_definitions extensions.path=/var/lib/ambari-server/resources/extensions http.strict-transport-security=max-age=31536000 http.x-frame-options=DENY http.x-xss-protection=1; mode=block java.home=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.232.b09-0.el7_7.x86_64/jre java.releases=jdk1.8,jdk1.7 jce.download.supported=true jce.name=jce_policy-8.zip jdk.download.supported=true jdk.name=jdk-8u77-linux-x64.tar.gz jdk1.7.desc=Oracle JDK 1.7 + Java Cryptography Extension (JCE) Policy Files 7 jdk1.7.dest-file=jdk-7u67-linux-x64.tar.gz jdk1.7.home=/usr/jdk64/ jdk1.7.jcpol-file=UnlimitedJCEPolicyJDK7.zip jdk1.7.jcpol-url=<a href="http://public-repo-1.hortonworks.com/ARTIFACTS/UnlimitedJCEPolicyJDK7.zip" target="_blank">http://public-repo-1.hortonworks.com/ARTIFACTS/UnlimitedJCEPolicyJDK7.zip</a> jdk1.7.re=(jdk.*)/jre jdk1.7.url=<a href="http://public-repo-1.hortonworks.com/ARTIFACTS/jdk-7u67-linux-x64.tar.gz" target="_blank">http://public-repo-1.hortonworks.com/ARTIFACTS/jdk-7u67-linux-x64.tar.gz</a> jdk1.8.desc=Oracle JDK 1.8 + Java Cryptography Extension (JCE) Policy Files 8 jdk1.8.dest-file=java-1.8.0-openjdk.x86_64 jdk1.8.home=/usr/lib/j jdk1.8.jcpol-file=jce_policy-8.zip jdk1.8.jcpol-url=<a href="http://public-repo-1.hortonworks.com/ARTIFACTS/jce_policy-8.zip" target="_blank">http://public-repo-1.hortonworks.com/ARTIFACTS/jce_policy-8.zip</a> jdk1.8.re=(jdk.*)/jre jdk1.8.url=<a href="http://public-repo-1.hortonworks.com/ARTIFACTS/jdk-8u77-linux-x64.tar.gz" target="_blank">http://public-repo-1.hortonworks.com/ARTIFACTS/jdk-8u77-linux-x64.tar.gz</a> kerberos.keytab.cache.dir=/var/lib/ambari-server/data/cache metadata.path=/var/lib/ambari-server/resources/stacks mpacks.staging.path=/var/lib/ambari-server/resources/mpacks pid.dir=/var/run/ambari-server recommendations.artifacts.lifetime=1w recommendations.dir=/var/run/ambari-server/stack-recommendations recovery.enabled_components=METRICS_COLLECTOR recovery.type=AUTO_START resources.dir=/var/lib/ambari-server/resources rolling.upgrade.skip.packages.prefixes= security.server.cert_name=https.crt security.server.crt_pass_file=https.pass.txt security.server.disabled.ciphers=TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384|TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384|TLS_RSA_WITH_AES_256_CBC_SHA256|TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384|TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384|TLS_DHE_RSA_WITH_AES_256_CBC_SHA256|TLS_DHE_DSS_WITH_AES_256_CBC_SHA256|TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA|TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA|TLS_RSA_WITH_AES_256_CBC_SHA|TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA|TLS_ECDH_RSA_WITH_AES_256_CBC_SHA|TLS_DHE_RSA_WITH_AES_256_CBC_SHA|TLS_DHE_DSS_WITH_AES_256_CBC_SHA|TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256|TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256|TLS_RSA_WITH_AES_128_CBC_SHA256|TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256|TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256|TLS_DHE_RSA_WITH_AES_128_CBC_SHA256|TLS_DHE_DSS_WITH_AES_128_CBC_SHA256|TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA|TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA|TLS_RSA_WITH_AES_128_CBC_SHA|TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA|TLS_ECDH_RSA_WITH_AES_128_CBC_SHA|TLS_DHE_RSA_WITH_AES_128_CBC_SHA|TLS_DHE_DSS_WITH_AES_128_CBC_SHA|TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA|TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA|TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA|TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA|SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA|SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA|TLS_EMPTY_RENEGOTIATION_INFO_SCSV|TLS_DH_anon_WITH_AES_256_CBC_SHA256|TLS_ECDH_anon_WITH_AES_256_CBC_SHA|TLS_DH_anon_WITH_AES_256_CBC_SHA|TLS_DH_anon_WITH_AES_128_CBC_SHA256|TLS_ECDH_anon_WITH_AES_128_CBC_SHA|TLS_DH_anon_WITH_AES_128_CBC_SHA|TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA|SSL_DH_anon_WITH_3DES_EDE_CBC_SHA|SSL_RSA_WITH_DES_CBC_SHA|SSL_DHE_RSA_WITH_DES_CBC_SHA|SSL_DHE_DSS_WITH_DES_CBC_SHA|SSL_DH_anon_WITH_DES_CBC_SHA|SSL_RSA_EXPORT_WITH_DES40_CBC_SHA|SSL_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA|SSL_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA|SSL_DH_anon_EXPORT_WITH_DES40_CBC_SHA|TLS_RSA_WITH_NULL_SHA256|TLS_ECDHE_ECDSA_WITH_NULL_SHA|TLS_ECDHE_RSA_WITH_NULL_SHA|SSL_RSA_WITH_NULL_SHA|TLS_ECDH_ECDSA_WITH_NULL_SHA|TLS_ECDH_RSA_WITH_NULL_SHA|TLS_ECDH_anon_WITH_NULL_SHA|SSL_RSA_WITH_NULL_MD5|TLS_KRB5_WITH_3DES_EDE_CBC_SHA|TLS_KRB5_WITH_3DES_EDE_CBC_MD5|TLS_KRB5_WITH_DES_CBC_SHA|TLS_KRB5_WITH_DES_CBC_MD5|TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA|TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5 security.server.key_name=https.key security.server.keys_dir=/var/lib/ambari-server/keys security.server.keystore_name=https.keystore.p12 security.server.truststore_name=https.keystore.p12 security.server.two_way_ssl=true server.connection.max.idle.millis=900000 server.execution.scheduler.isClustered=false server.execution.scheduler.maxDbConnections=5 server.execution.scheduler.maxThreads=5 server.execution.scheduler.misfire.toleration.minutes=480 server.fqdn.service.url=<a href="http://169.254.169.254/latest/meta-data/public-hostname" target="_blank">http://169.254.169.254/latest/meta-data/public-hostname</a> server.http.session.inactive_timeout=1800 server.jdbc.connection-pool=internal server.jdbc.database=postgres server.jdbc.database_name=datalake server.jdbc.postgres.schema=datalake server.jdbc.user.name=root server.jdbc.user.passwd=/etc/ambari-server/conf/password.dat server.os_family=redhat7 server.os_type=centos7 server.persistence.type=local server.stages.parallel=true server.task.timeout=1200 server.timeline.metrics.https.enabled=true server.tmp.dir=/var/lib/ambari-server/data/tmp server.version.file=/var/lib/ambari-server/resources/version shared.resources.dir=/usr/lib/ambari-server/lib/ambari_commons/resources skip.service.checks=false stackadvisor.script=/var/lib/ambari-server/resources/scripts/stack_advisor.py ulimit.open.files=10000 user.inactivity.timeout.default=0 user.inactivity.timeout.role.readonly.default=0 views.ambari.request.connect.timeout.millis=30000 views.ambari.request.read.timeout.millis=45000 views.http.strict-transport-security=max-age=31536000 views.http.x-frame-options=SAMEORIGIN views.http.x-xss-protection=1; mode=block views.request.connect.timeout.millis=5000 views.request.read.timeout.millis=10000 webapp.dir=/usr/lib/ambari-server/web ambari-agent.ini file [server] hostname=ambari.server url_port=8440 secured_url_port=8441 [agent] logdir=/var/log/ambari-agent piddir=/var/run/ambari-agent prefix=/var/lib/ambari-agent/data ;loglevel=(DEBUG/INFO) loglevel=INFO data_cleanup_interval=86400 data_cleanup_max_age=2592000 data_cleanup_max_size_MB = 100 ping_port=8670 cache_dir=/var/lib/ambari-agent/cache tolerate_download_failures=true run_as_user=root parallel_execution=0 alert_grace_period=5 alert_kinit_timeout=14400000 system_resource_overrides=/etc/resource_overrides ; memory_threshold_soft_mb=400 ; memory_threshold_hard_mb=1000 [security] keysdir=/var/lib/ambari-agent/keys server_crt=ca.crt passphrase_env_var_name=AMBARI_PASSPHRASE ssl_verify_cert=0 [services] pidLookupPath=/var/run/ [heartbeat] state_interval_seconds=60 dirs=/etc/hadoop,/etc/hadoop/conf,/etc/hbase,/etc/hcatalog,/etc/hive,/etc/oozie, /etc/sqoop,/etc/ganglia, /var/run/hadoop,/var/run/zookeeper,/var/run/hbase,/var/run/templeton,/var/run/oozie, /var/log/hadoop,/var/log/zookeeper,/var/log/hbase,/var/run/templeton,/var/log/hive ; 0 - unlimited log_lines_count=300 idle_interval_min=1 idle_interval_max=10 [logging] syslog_enabled=0 /etc/hosts file :  [root@ambari ~]# cat /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 192.168.253.46 pocserver2 pocserver2 192.168.253.47 pocserver3 pocserver3 192.168.253.45 ambari.server  Java version:  [root@ambari ~]# java -version openjdk version "1.8.0_232" OpenJDK Runtime Environment (build 1.8.0_232-b09) OpenJDK 64-Bit Server VM (build 25.232-b09, mixed mode)     ... 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