Hi Tarek,
Thank's a lot, this was the solution.
I wish you a nice weekend
Marinos
2015-05-29 18:38 GMT+03:00 <t.elsaleh@surrey.ac.uk>:
Hi Marinos,
Please could you try this:
http://askubuntu.com/questions/154953/specify-jdk-for-tomcat7
Here you should explicitly specify the path for the Oracle Java JDK that tomcat will use. Then please make sure you restart tomcat7.
Best regards,
Tarek
From: marinos kardaris marinoskardaris@gmail.com
Sent: 29 May 2015 16:24
To: Elsaleh T Mr (Electronic Eng)
Subject: Re: IoTDiscovery
Hi Tarek,
I did all your suggestions but I still have the same problem.
I found an explanation in the following link which suggest some steps. I don't know if it can help.
http://stackoverflow.com/questions/22489398/unsupported-major-minor-version-52-0
Best regards
Marinos
2015-05-28 17:06 GMT+03:00 <t.elsaleh@surrey.ac.uk>:
Hi Marinos,
The problem is with a type of class we use in java, called a “listener”. These classes are called first when the webapp is deployed. There is something it doesn’t like about it. At this point I can only guess it is a java version issue.
Have you tried restarting the machine? Have you uninstalled Java 1.7?
If you are on ubunutu you can try this on the terminal: “ps -ef | grep tomcat7”
This should give an indication of the version being used.
Best regards,
Tarek
From: marinos kardaris marinoskardaris@gmail.com
Sent: 28 May 2015 13:25
To: Elsaleh T Mr (Electronic Eng)
Subject: Re: IoTDiscovery
It is exactly the same:
May 28, 2015 2:41:51 PM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Skipped installing application listeners due to previous error(s)
May 28, 2015 2:43:15 PM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Error configuring application listener of class uk.ac.surrey.ee.iot.fiware.ngsi9.storage.db4o.StorageStartup
java.lang.UnsupportedClassVersionError: uk/ac/surrey/ee/iot/fiware/ngsi9/storage/db4o/StorageStartup : Unsupported major.minor version 52.0 (unable to load class uk.ac.surrey.ee.iot.fiware.ngsi9.storage.db4o.StorageStartup)
at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2961)
at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1210)
I am apologize for your time, ones more thank's a lot
Marinos
2015-05-28 15:15 GMT+03:00 <t.elsaleh@surrey.ac.uk>:
Do you still get this error: “Unsupported major.minor version 52.0”?
Or is it another error?
Best regards,
Tarek
From: marinos kardaris marinoskardaris@gmail.com
Sent: 28 May 2015 12:56
To: Elsaleh T Mr (Electronic Eng)
Subject: Re: IoTDiscovery
Hi Tarek,
I tried but I received the same error.
I saw that it is not created in /ngsi9/repository the ngsiRegRepo.db40 files
something is uncompatible with this class
Could you send me the ngsi9.war maybe is corrupted in Catalogue
Thank you for your effort
Marinos
2015-05-28 14:29 GMT+03:00 <t.elsaleh@surrey.ac.uk>:
Hi Marinos,
Try with tomcat7, you should be ok.
Best regards,
Tarek
From: marinos kardaris marinoskardaris@gmail.com
Sent: 28 May 2015 12:28
To: Elsaleh T Mr (Electronic Eng)
Subject: Re: IoTDiscovery
Hi Tarek,
I will upgrade java to version 8. But in this case I will have problem with tomcat 7 which supports only V7 java.
May be I need also Tomcat 8. What you suggest?
Best regards
Marinos
2015-05-28 13:33 GMT+03:00 <t.elsaleh@surrey.ac.uk>:
Hi Marinos,
IoT Discovery requires Java 1.8. Would you be able to upgrade you java version?
Best regards,
Tarek
From: marinos kardaris marinoskardaris@gmail.com
Sent: 28 May 2015 09:40
To: Elsaleh T Mr (Electronic Eng)
Subject: Re: IoTDiscovery
java version is 1.7.0_79
Marinos
2015-05-28 11:38 GMT+03:00 <t.elsaleh@surrey.ac.uk>:
Thanks!....please could you confirm which java version you are using.
Type in terminal: “java –version”
Best regards,
Tarek
From: marinos kardaris marinoskardaris@gmail.com
Sent: 28 May 2015 09:34
To: Elsaleh T Mr (Electronic Eng)
Subject: Re: IoTDiscovery
Hi Tarek,
Please find attached the required files
Best regards
Marinos
2015-05-28 11:22 GMT+03:00 <t.elsaleh@surrey.ac.uk>:
Hi Marinos,
Please send me the tomcat log, so I can deduce more information about the problem.
You will find it under:
• “
{tomcat_home}/logs/localhost.2015-05-##.log
• “{tomcat_home}
/logs/catalina.2015-05-##.log
Best regards,
Tarek
From: marinos kardaris marinoskardaris@gmail.com
Sent: 28 May 2015 09:17
To: Elsaleh T Mr (Electronic Eng)
Subject: Re: IoTDiscovery
Hi Tarek,
I follow your instructions and I download the release 4.2 from the catalogue but it create to me a more serious problem as I receive the following message:
FAIL - Application at context path /ngsi9 could not be started
All the other environmet is the same tomcat7, java etc.
Have you any idea?
Thank's in advance
Marinos
2015-05-27 13:24 GMT+03:00 mk <mkardaris@f-in.gr>:
Hi Tarek,
Thank you for your answer. I had download from
http://catalogue.fiware.org/enablers/configuration-manager-iot-discovery/downloads.
But now I see a very new version. I will try with this as soon as possible.
Thanks a lot again
Marinos
Hi Tarek,
Thank's a lot, this was the solution.
I wish you a nice weekend
Marinos
2015-05-29 18:38 GMT+03:00 <t.elsaleh@surrey.ac.uk>:
Hi Marinos,
Please could you try this:
http://askubuntu.com/questions/154953/specify-jdk-for-tomcat7
Here you should explicitly specify the path for the Oracle Java JDK that tomcat will use. Then please make sure you restart tomcat7.
Best regards,
Tarek
From: marinos kardaris marinoskardaris@gmail.com
Sent: 29 May 2015 16:24
To: Elsaleh T Mr (Electronic Eng)
Subject: Re: IoTDiscovery
Hi Tarek,
I did all your suggestions but I still have the same problem.
I found an explanation in the following link which suggest some steps. I don't know if it can help.
http://stackoverflow.com/questions/22489398/unsupported-major-minor-version-52-0
Best regards
Marinos
2015-05-28 17:06 GMT+03:00 <t.elsaleh@surrey.ac.uk>:
Hi Marinos,
The problem is with a type of class we use in java, called a “listener”. These classes are called first when the webapp is deployed. There is something it doesn’t like about it. At this point I can only guess it is a java version issue.
Have you tried restarting the machine? Have you uninstalled Java 1.7?
If you are on ubunutu you can try this on the terminal: “ps -ef | grep tomcat7”
This should give an indication of the version being used.
Best regards,
Tarek
From: marinos kardaris marinoskardaris@gmail.com
Sent: 28 May 2015 13:25
To: Elsaleh T Mr (Electronic Eng)
Subject: Re: IoTDiscovery
It is exactly the same:
May 28, 2015 2:41:51 PM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Skipped installing application listeners due to previous error(s)
May 28, 2015 2:43:15 PM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Error configuring application listener of class uk.ac.surrey.ee.iot.fiware.ngsi9.storage.db4o.StorageStartup
java.lang.UnsupportedClassVersionError: uk/ac/surrey/ee/iot/fiware/ngsi9/storage/db4o/StorageStartup : Unsupported major.minor version 52.0 (unable to load class uk.ac.surrey.ee.iot.fiware.ngsi9.storage.db4o.StorageStartup)
at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2961)
at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1210)
I am apologize for your time, ones more thank's a lot
Marinos
2015-05-28 15:15 GMT+03:00 <t.elsaleh@surrey.ac.uk>:
Do you still get this error: “Unsupported major.minor version 52.0”?
Or is it another error?
Best regards,
Tarek
From: marinos kardaris marinoskardaris@gmail.com
Sent: 28 May 2015 12:56
To: Elsaleh T Mr (Electronic Eng)
Subject: Re: IoTDiscovery
Hi Tarek,
I tried but I received the same error.
I saw that it is not created in /ngsi9/repository the ngsiRegRepo.db40 files
something is uncompatible with this class
Could you send me the ngsi9.war maybe is corrupted in Catalogue
Thank you for your effort
Marinos
2015-05-28 14:29 GMT+03:00 <t.elsaleh@surrey.ac.uk>:
Hi Marinos,
Try with tomcat7, you should be ok.
Best regards,
Tarek
From: marinos kardaris marinoskardaris@gmail.com
Sent: 28 May 2015 12:28
To: Elsaleh T Mr (Electronic Eng)
Subject: Re: IoTDiscovery
Hi Tarek,
I will upgrade java to version 8. But in this case I will have problem with tomcat 7 which supports only V7 java.
May be I need also Tomcat 8. What you suggest?
Best regards
Marinos
2015-05-28 13:33 GMT+03:00 <t.elsaleh@surrey.ac.uk>:
Hi Marinos,
IoT Discovery requires Java 1.8. Would you be able to upgrade you java version?
Best regards,
Tarek
From: marinos kardaris marinoskardaris@gmail.com
Sent: 28 May 2015 09:40
To: Elsaleh T Mr (Electronic Eng)
Subject: Re: IoTDiscovery
java version is 1.7.0_79
Marinos
2015-05-28 11:38 GMT+03:00 <t.elsaleh@surrey.ac.uk>:
Thanks!....please could you confirm which java version you are using.
Type in terminal: “java –version”
Best regards,
Tarek
From: marinos kardaris marinoskardaris@gmail.com
Sent: 28 May 2015 09:34
To: Elsaleh T Mr (Electronic Eng)
Subject: Re: IoTDiscovery
Hi Tarek,
Please find attached the required files
Best regards
Marinos
2015-05-28 11:22 GMT+03:00 <t.elsaleh@surrey.ac.uk>:
Hi Marinos,
Please send me the tomcat log, so I can deduce more information about the problem.
You will find it under:
• “
{tomcat_home}/logs/localhost.2015-05-##.log• “{tomcat_home}
/logs/catalina.2015-05-##.log
Best regards,
Tarek
From: marinos kardaris marinoskardaris@gmail.com
Sent: 28 May 2015 09:17
To: Elsaleh T Mr (Electronic Eng)
Subject: Re: IoTDiscovery
Hi Tarek,
I follow your instructions and I download the release 4.2 from the catalogue but it create to me a more serious problem as I receive the following message:
FAIL - Application at context path /ngsi9 could not be started
All the other environmet is the same tomcat7, java etc.
Have you any idea?
Thank's in advance
Marinos
2015-05-27 13:24 GMT+03:00 mk <mkardaris@f-in.gr>:
Hi Tarek,
Thank you for your answer. I had download from
http://catalogue.fiware.org/enablers/configuration-manager-iot-discovery/downloads.
But now I see a very new version. I will try with this as soon as possible.
Thanks a lot again
Marinos