NED --ERROR-- java uninitialized cause java path changed

[yeepsae17]

< Symptom >

Reloading NED packages failed.

root@ncs# packages reload

reload-result {

    package alu-sr

    result false

    info --ERROR--

}

reload-result {

    package cisco-iosxr

    result false

    info --ERROR--

}

reload-result {

    package l3vpn

    result true

}

reload-result {

    package huawei-vrp

    result false

    info --ERROR--

root@ncs# show packages package oper-status              

                                                                                     PACKAGE               

                      PROGRAM                                                        META     FILE         

                      CODE     JAVA           BAD NCS  PACKAGE  PACKAGE  CIRCULAR    DATA     LOAD   ERROR 

NAME              UP  ERROR    UNINITIALIZED  VERSION  NAME     VERSION  DEPENDENCY  ERROR    ERROR  INFO  

------------------------------------------------------------------------------------------------------------

alu-sr            -   -        X              -        -        -        -           -        -      -     

cisco-iosxr       -   -        X              -        -        -        -           -        -      -     

huawei-vrp        -   -        X              -        -        -        -           -        -      -     

l3vpn             X   -        -              -        -        -        -           -        -      -     

< troubleshoot >

After java path was changed by any reason, once the nso restarts, java-vm doesn’t come up with this error msg in the ncs-java-vm.log,

Starting java-vm with options:\n' -classpath :/opt/ncs/current/java/jar/* -Dport=4569 -Djava.security.egd=file:/dev/./urandom -Dfile.encoding=UTF-8'
/opt/ncs/current/bin/ncs-start-java-vm: line 97: exec: java: not found

The new java path was exported in shell environment, so the ncs-start-java-vm can be executed from SHELL directly, but not started by "/etc/init.d/ncs start"

In order to find the reason why it doesn't start, I did two ways as below.

1) I modified the ncs-start-java-vm line 97 like “exec /usr/local/java/bin/java ${opts} ${mainclass}”, then it’s working.

2) I created symbolic link like 'ln -s /usr/local/java/bin/java /usr/bin/java', then it's working. 

In case of local installation, it doesn't have this problem, however in case of the system installation I think the ncs-start-java-vm can't get the shell environment. 

Can anyone give me better idea? 

[ramkraja]

Is /usr/local/java/bin in your PATH when you start NSO?

You cannot change the env variables of an already running Linux process.

[yeepsae17]

The environment is applied once the process is restarted.

When the NSO started, the /usr/local/java/bin was not in the PATH.

While the NSO was running, someone installed new jdk and the PATH was chagned.

So I restarted the NSO, but the new PATH was not applied.

I think you could reproduce this.

0) in the system installation,

1) remove the /usr/bin/java which should be symbolic link.

2) create the the symbolic link under the other directory which is in the PATH

3) restart the NSO (/etc/init.d/ncs restart)

4) Java VM is not running. 

In case of local installation, the Java VM is running.