Power Global

Installed Nagios 4.4.14 on RHEL 7.9 lpar for monitoring IBMi/AIX lpars, but got a Java ClassNotFoundError, when configuring a IBMi lpar
(step 3 of: Setting Up Nagios Plug-in for IBM i

)

nagios]# /bin/bash /usr/local/nagios/libexec/host_config.sh -i host
Input the host address(IP):XXXXXX
Input the userID: YYYYYYY
Input the password:
Confirm the password:
Exception in thread "main" java.lang.NoClassDefFoundError: com/ibm/as400/access/AS400
at com.ibm.nagios.config.HostConfig.Insert(HostConfig.java:113)
at com.ibm.nagios.config.HostConfig.main(HostConfig.java:82)
Caused by: java.lang.ClassNotFoundException: com.ibm.as400.access.AS400
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
... 2 more

tried to set $CLASSPATH to the jar files, but still same result.....

Anyone an idea to fix this problem?

It looks like you don't have JT400 or JTOPEN installed . The missing java class com.ibm.as400.access.AS400 it's included on both the .jar files. Have a look here https://www.ibm.com/support/pages/welcome-ibm-toolbox-java-and-jtopen and download JTOpen. 

Installed Nagios 4.4.14 on RHEL 7.9 lpar for monitoring IBMi/AIX lpars, but got a Java ClassNotFoundError, when configuring a IBMi lpar
(step 3 of: Setting Up Nagios Plug-in for IBM i

)

nagios]# /bin/bash /usr/local/nagios/libexec/host_config.sh -i host
Input the host address(IP):XXXXXX
Input the userID: YYYYYYY
Input the password:
Confirm the password:
Exception in thread "main" java.lang.NoClassDefFoundError: com/ibm/as400/access/AS400
at com.ibm.nagios.config.HostConfig.Insert(HostConfig.java:113)
at com.ibm.nagios.config.HostConfig.main(HostConfig.java:82)
Caused by: java.lang.ClassNotFoundException: com.ibm.as400.access.AS400
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
... 2 more

tried to set $CLASSPATH to the jar files, but still same result.....

Anyone an idea to fix this problem?

Hi Alberto,

On the Nagios RHEL server the jar file is available, but in https://www.ibm.com/support/pages/setting-nagios-plug-ibm-i nothing is mentioned about installing something on a IBMi lpar?!

On the RHEL Nagios server:

# find /usr -name jt*.jar
/usr/local/nagios/libexec/jt400.jar
/usr/local/nagios/nagios-for-i-master/Wizard for NagiosXI/ibmiservice/plugins/jt400.jar
/usr/local/nagios/nagios-for-i-master/libexec/jt400.jar

It looks like you don't have JT400 or JTOPEN installed . The missing java class com.ibm.as400.access.AS400 it's included on both the .jar files. Have a look here https://www.ibm.com/support/pages/welcome-ibm-toolbox-java-and-jtopen and download JTOpen. 

Installed Nagios 4.4.14 on RHEL 7.9 lpar for monitoring IBMi/AIX lpars, but got a Java ClassNotFoundError, when configuring a IBMi lpar
(step 3 of: Setting Up Nagios Plug-in for IBM i

)

nagios]# /bin/bash /usr/local/nagios/libexec/host_config.sh -i host
Input the host address(IP):XXXXXX
Input the userID: YYYYYYY
Input the password:
Confirm the password:
Exception in thread "main" java.lang.NoClassDefFoundError: com/ibm/as400/access/AS400
at com.ibm.nagios.config.HostConfig.Insert(HostConfig.java:113)
at com.ibm.nagios.config.HostConfig.main(HostConfig.java:82)
Caused by: java.lang.ClassNotFoundException: com.ibm.as400.access.AS400
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
... 2 more

tried to set $CLASSPATH to the jar files, but still same result.....

Anyone an idea to fix this problem?

Hello Emiel,

jt400 should be already installed on your LPAR.

Check this IBM Document https://www.ibm.com/support/pages/where-should-toolbox-jar-files-be-installed-ibm-i that explain where to install/find the jt400.jar file.

If as i imagine the connection starts from the RHEL server you should have the jt400 file only on the server side and not necessarily on IBM i LPAR.

If you have any further debug messages from this "/bin/bash /usr/local/nagios/libexec/host_config.sh -i host" script please post it.

Hi Alberto,

On the Nagios RHEL server the jar file is available, but in https://www.ibm.com/support/pages/setting-nagios-plug-ibm-i nothing is mentioned about installing something on a IBMi lpar?!

On the RHEL Nagios server:

# find /usr -name jt*.jar
/usr/local/nagios/libexec/jt400.jar
/usr/local/nagios/nagios-for-i-master/Wizard for NagiosXI/ibmiservice/plugins/jt400.jar
/usr/local/nagios/nagios-for-i-master/libexec/jt400.jar

It looks like you don't have JT400 or JTOPEN installed . The missing java class com.ibm.as400.access.AS400 it's included on both the .jar files. Have a look here https://www.ibm.com/support/pages/welcome-ibm-toolbox-java-and-jtopen and download JTOpen. 

Installed Nagios 4.4.14 on RHEL 7.9 lpar for monitoring IBMi/AIX lpars, but got a Java ClassNotFoundError, when configuring a IBMi lpar
(step 3 of: Setting Up Nagios Plug-in for IBM i

)

nagios]# /bin/bash /usr/local/nagios/libexec/host_config.sh -i host
Input the host address(IP):XXXXXX
Input the userID: YYYYYYY
Input the password:
Confirm the password:
Exception in thread "main" java.lang.NoClassDefFoundError: com/ibm/as400/access/AS400
at com.ibm.nagios.config.HostConfig.Insert(HostConfig.java:113)
at com.ibm.nagios.config.HostConfig.main(HostConfig.java:82)
Caused by: java.lang.ClassNotFoundException: com.ibm.as400.access.AS400
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
... 2 more

tried to set $CLASSPATH to the jar files, but still same result.....

Anyone an idea to fix this problem?

Hi Alberto,

The script runs on the Nagios server on RHEL.

I added the directory where the jar files reside into the CLASSPATH:
 echo $CLASSPATH
:/usr/local/nagios/libexec/

ls -l /usr/local/nagios/libexec/*.jar
-rw-r--r--. 1 501 games  240514 Nov  4  2019 /usr/local/nagios/libexec/gson.jar
-rw-rw-rw-. 1 501 games 4703153 May 11  2017 /usr/local/nagios/libexec/jt400.jar
-rw-r--r--. 1 501 games  330473 Apr 10  2020 /usr/local/nagios/libexec/nagios4i.jar

The contents of the script is:

# cat host_config.sh
#!/bin/bash
java -cp /usr/local/nagios/libexec/nagios4i.jar com.ibm.nagios.config.HostConfig $1 $2

no idea how to debug that 

Hello Emiel,

jt400 should be already installed on your LPAR.

Check this IBM Document https://www.ibm.com/support/pages/where-should-toolbox-jar-files-be-installed-ibm-i that explain where to install/find the jt400.jar file.

If as i imagine the connection starts from the RHEL server you should have the jt400 file only on the server side and not necessarily on IBM i LPAR.

If you have any further debug messages from this "/bin/bash /usr/local/nagios/libexec/host_config.sh -i host" script please post it.

Hi Alberto,

On the Nagios RHEL server the jar file is available, but in https://www.ibm.com/support/pages/setting-nagios-plug-ibm-i nothing is mentioned about installing something on a IBMi lpar?!

On the RHEL Nagios server:

# find /usr -name jt*.jar
/usr/local/nagios/libexec/jt400.jar
/usr/local/nagios/nagios-for-i-master/Wizard for NagiosXI/ibmiservice/plugins/jt400.jar
/usr/local/nagios/nagios-for-i-master/libexec/jt400.jar

It looks like you don't have JT400 or JTOPEN installed . The missing java class com.ibm.as400.access.AS400 it's included on both the .jar files. Have a look here https://www.ibm.com/support/pages/welcome-ibm-toolbox-java-and-jtopen and download JTOpen. 

Installed Nagios 4.4.14 on RHEL 7.9 lpar for monitoring IBMi/AIX lpars, but got a Java ClassNotFoundError, when configuring a IBMi lpar
(step 3 of: Setting Up Nagios Plug-in for IBM i

)

nagios]# /bin/bash /usr/local/nagios/libexec/host_config.sh -i host
Input the host address(IP):XXXXXX
Input the userID: YYYYYYY
Input the password:
Confirm the password:
Exception in thread "main" java.lang.NoClassDefFoundError: com/ibm/as400/access/AS400
at com.ibm.nagios.config.HostConfig.Insert(HostConfig.java:113)
at com.ibm.nagios.config.HostConfig.main(HostConfig.java:82)
Caused by: java.lang.ClassNotFoundException: com.ibm.as400.access.AS400
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
... 2 more

tried to set $CLASSPATH to the jar files, but still same result.....

Anyone an idea to fix this problem?

Hi Alberto,

The script runs on the Nagios server on RHEL.

I added the directory where the jar files reside into the CLASSPATH:
 echo $CLASSPATH
:/usr/local/nagios/libexec/

ls -l /usr/local/nagios/libexec/*.jar
-rw-r--r--. 1 501 games  240514 Nov  4  2019 /usr/local/nagios/libexec/gson.jar
-rw-rw-rw-. 1 501 games 4703153 May 11  2017 /usr/local/nagios/libexec/jt400.jar
-rw-r--r--. 1 501 games  330473 Apr 10  2020 /usr/local/nagios/libexec/nagios4i.jar

The contents of the script is:

# cat host_config.sh
#!/bin/bash
java -cp /usr/local/nagios/libexec/nagios4i.jar com.ibm.nagios.config.HostConfig $1 $2

no idea how to debug that 

Hello Emiel,

jt400 should be already installed on your LPAR.

Check this IBM Document https://www.ibm.com/support/pages/where-should-toolbox-jar-files-be-installed-ibm-i that explain where to install/find the jt400.jar file.

If as i imagine the connection starts from the RHEL server you should have the jt400 file only on the server side and not necessarily on IBM i LPAR.

If you have any further debug messages from this "/bin/bash /usr/local/nagios/libexec/host_config.sh -i host" script please post it.

Hi Alberto,

On the Nagios RHEL server the jar file is available, but in https://www.ibm.com/support/pages/setting-nagios-plug-ibm-i nothing is mentioned about installing something on a IBMi lpar?!

On the RHEL Nagios server:

# find /usr -name jt*.jar
/usr/local/nagios/libexec/jt400.jar
/usr/local/nagios/nagios-for-i-master/Wizard for NagiosXI/ibmiservice/plugins/jt400.jar
/usr/local/nagios/nagios-for-i-master/libexec/jt400.jar

It looks like you don't have JT400 or JTOPEN installed . The missing java class com.ibm.as400.access.AS400 it's included on both the .jar files. Have a look here https://www.ibm.com/support/pages/welcome-ibm-toolbox-java-and-jtopen and download JTOpen. 

Installed Nagios 4.4.14 on RHEL 7.9 lpar for monitoring IBMi/AIX lpars, but got a Java ClassNotFoundError, when configuring a IBMi lpar
(step 3 of: Setting Up Nagios Plug-in for IBM i

)

nagios]# /bin/bash /usr/local/nagios/libexec/host_config.sh -i host
Input the host address(IP):XXXXXX
Input the userID: YYYYYYY
Input the password:
Confirm the password:
Exception in thread "main" java.lang.NoClassDefFoundError: com/ibm/as400/access/AS400
at com.ibm.nagios.config.HostConfig.Insert(HostConfig.java:113)
at com.ibm.nagios.config.HostConfig.main(HostConfig.java:82)
Caused by: java.lang.ClassNotFoundException: com.ibm.as400.access.AS400
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
... 2 more

tried to set $CLASSPATH to the jar files, but still same result.....

Anyone an idea to fix this problem?

This script is working here:

#!/bin/bash
java -cp /usr/local/nagios/libexec/jt400.jar:/usr/local/nagios/libexec/nagios4i.jar com.ibm.nagios.config.HostConfig $1 $2

Don't forget to create /usr/local/nagios/etc/objects/ and /usr/local/nagios/var/ 😉

Hi Alberto,

The script runs on the Nagios server on RHEL.

I added the directory where the jar files reside into the CLASSPATH:
 echo $CLASSPATH
:/usr/local/nagios/libexec/

ls -l /usr/local/nagios/libexec/*.jar
-rw-r--r--. 1 501 games  240514 Nov  4  2019 /usr/local/nagios/libexec/gson.jar
-rw-rw-rw-. 1 501 games 4703153 May 11  2017 /usr/local/nagios/libexec/jt400.jar
-rw-r--r--. 1 501 games  330473 Apr 10  2020 /usr/local/nagios/libexec/nagios4i.jar

The contents of the script is:

# cat host_config.sh
#!/bin/bash
java -cp /usr/local/nagios/libexec/nagios4i.jar com.ibm.nagios.config.HostConfig $1 $2

no idea how to debug that 

Hello Emiel,

jt400 should be already installed on your LPAR.

Check this IBM Document https://www.ibm.com/support/pages/where-should-toolbox-jar-files-be-installed-ibm-i that explain where to install/find the jt400.jar file.

If as i imagine the connection starts from the RHEL server you should have the jt400 file only on the server side and not necessarily on IBM i LPAR.

If you have any further debug messages from this "/bin/bash /usr/local/nagios/libexec/host_config.sh -i host" script please post it.

Hi Alberto,

On the Nagios RHEL server the jar file is available, but in https://www.ibm.com/support/pages/setting-nagios-plug-ibm-i nothing is mentioned about installing something on a IBMi lpar?!

On the RHEL Nagios server:

# find /usr -name jt*.jar
/usr/local/nagios/libexec/jt400.jar
/usr/local/nagios/nagios-for-i-master/Wizard for NagiosXI/ibmiservice/plugins/jt400.jar
/usr/local/nagios/nagios-for-i-master/libexec/jt400.jar

It looks like you don't have JT400 or JTOPEN installed . The missing java class com.ibm.as400.access.AS400 it's included on both the .jar files. Have a look here https://www.ibm.com/support/pages/welcome-ibm-toolbox-java-and-jtopen and download JTOpen. 

Installed Nagios 4.4.14 on RHEL 7.9 lpar for monitoring IBMi/AIX lpars, but got a Java ClassNotFoundError, when configuring a IBMi lpar
(step 3 of: Setting Up Nagios Plug-in for IBM i