Mysql JDBC connection error for ambari installation

[#1]

sudo apt-get install libmysql-java
Reading package lists... Done
Building dependency tree
Reading state information... Done
libmysql-java is already the newest version (5.1.45-1).
0 upgraded, 0 newly installed, 0 to remove and 92 not upgraded.

/usr/jdk64/jdk1.8.0_112/bin/java -cp /usr/lib/ambari-agent/DBConnectionVerification.jar:/usr/share/java/mysql-connector-java.jar org.apache.ambari.server.DBConnectionVerification "jdbc:mysql://XXXXXX:3306/ambari" "ambari" "password" com.mysql.jdbc.Driver
ERROR: Unable to connect to the DB. Please check DB connection properties.
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver

[#2]

Hi @Manoj690 

Can you share output of below commands -

1. $ ls -ltr /usr/share/java/mysql.jar
2. $find / -name mysql.jar
3. $find / -name mysql-connector-java*.jar

[#3]

#ls -ltr /usr/share/java/mysql.jar
ls: cannot access '/usr/share/java/mysql.jar': No such file or directory

# find / -name mysql.jar
find: ‘/run/user/1000/doc’: Permission denied
find: ‘/run/user/1000/gvfs’: Permission denied

# find / -name mysql-connector-java*.jar
/usr/share/java/mysql-connector-java.jar
/var/lib/ambari-server/resources/mysql-connector-java.jar
find: ‘/run/user/1000/doc’: Permission denied
find: ‘/run/user/1000/gvfs’: Permission denied
/home/gaian/Downloads/mysql-connector-java.jar

[#4 · Accepted solution]

Hi @Manoj690 

Can you copy - "/var/lib/ambari-server/resources/mysql-connector-java.jar" to "/usr/share/java/"

and retry.

Make sure you use correct java path for the java version you are pointing too.

[#5]

i did that but still show same error

#usr/jdk64/jdk1.8.0_112/bin/java -cp
/usr/lib/ambari-agent/DBConnectionVerification.jar:/usr/share/java/mysql-connector-java-5.1.37.jar
org.apache.ambari.server.DBConnectionVerification
"jdbc:mysql://xxxxx:3306/ambari" "ambari" "Password" com.mysql.jdbc.Driver
ERROR: Unable to connect to the DB. Please check DB connection properties.
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications
link failure
The last packet sent successfully to the server was 0 milliseconds ago. The
driver has not received any packets from the server.

[#6]

Hi @Manoj690 

Now the error is different -

"jdbc:mysql://xxxxx:3306/ambari" "ambari" "Password" com.mysql.jdbc.Driver
ERROR: Unable to connect to the DB. Please check DB connection properties.
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications
link failure

Probably check connection to your DB server from ambari node.

Login to ambari server and telnet -

$telnet <DB_HOST>  3306

Make sure IPtables/selinux is disabled.

If you think initial issue is resolved please close this topic my accepting the correct reply on thread.

Will be happy to help you for above issue. Please keep posted.

[#7]

telnet is working but still shows same error ,,  iptables and selinux are disabled

[#8]

From Ambari node can you try -

mysql -u <ambari_DB_username> <Ambari_DB_name> -h <DB_hostname> -P <Port>

Check if you are able to successfully login to the DB from ambari node.

[#9]

For localhost i am able to connect

for my host i am unable to connect

mysql -u ambari -p ambari -h xxxxxxxxxx -P 3306
Enter password:
ERROR 2003 (HY000): Can't connect to MySQL server on 'xxxxxxxxx' (111)

[#10]

@Manoj690  login to mysql and follow step 2 from below link

https://docs.cloudera.com/HDPDocuments/Ambari-2.7.3.0/administering-ambari/content/amb_using_ambari_...

make sure you give. permission as per your ambari hostname(FQDN) also.