Rest API installation - TANGO Controls

# 3 years ago
Coacolo	Hello, I would like to use the rest tango API to develop a web GUI (with Ada Web Server) for a project using tango. To test the possibility, I installed Tango's 9.3.4 package on a Debian buster. It seems to be ok for most applications (jive, pogo, astor) but not for tangorestserver. There is a java version problem. Version 1.8.x is too old. So I changed in the TangoRestServer bash to a newer version (version 11) and it seems to work. I followed the explanations given on the link https://github.com/tango-controls/rest-server/wiki by creating a device server with jive then I ran "TangoRestServer test" and I got the following answer: WARN 2021-02-02 11:36:26,772 [main - - o.t.c.d.Database] org.tango.client.database.Database.<init>:41 - database cache version release 1.13 not supported, please install it to have better performance INFO 2021-02-02 11:36:26,929 [main - test/rest/0 - o.t.TangoRestServer] org.tango.TangoRestServer.init:145 - Initializing TangoRestServer device… WARN 2021-02-02 11:36:26,940 [main - test/rest/0 - o.t.s.e.EventManager] org.tango.server.events.EventManager.initializeClientHwm:145 - CtrlSystem/EventBufferHwm property is not a number: INFO 2021-02-02 11:36:27,025 [main - test/rest/0 - o.t.s.ServerManager] org.tango.server.ServerManager.init:265 - TANGO server TangoRestServer/test started WARN 2021-02-02 11:36:27,026 [main - test/rest/0 - o.t.s.ServerManagerUtils] org.tango.server.ServerManagerUtils.dumpPID:47 - Failed to create pid file /var/tmp/TangoRestServer/TangoRestServer.pid due to java.nio.file.NoSuchFileException: TangoRestServer.pid Exception in thread "main" java.lang.RuntimeException: java.nio.file.NoSuchFileException: /var/tmp/TangoRestServer/tomcat_4274159224536421215 at org.tango.web.server.tomcat.TomcatBootstrap.initializeBaseDir(TomcatBootstrap.java:74) at org.tango.TangoRestServer.startTomcat(TangoRestServer.java:126) at org.tango.TangoRestServer.main(TangoRestServer.java:118) Caused by: java.nio.file.NoSuchFileException: /var/tmp/TangoRestServer/tomcat_4274159224536421215 at java.base/sun.nio.fs.UnixException.translateToIOException(UnixException.java:92) at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111) at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:116) at java.base/sun.nio.fs.UnixFileSystemProvider.createDirectory(UnixFileSystemProvider.java:389) at java.base/java.nio.file.Files.createDirectory(Files.java:689) at java.base/java.nio.file.TempFileHelper.create(TempFileHelper.java:135) at java.base/java.nio.file.TempFileHelper.createTempDirectory(TempFileHelper.java:172) at java.base/java.nio.file.Files.createTempDirectory(Files.java:965) at org.tango.web.server.tomcat.TomcatBootstrap.initializeBaseDir(TomcatBootstrap.java:64) … 2 more I then run the following command in another terminal : curl -u "tango-cs: tango" http: // localhost: 10001 / tango / rest and I have the following answer: curl: (7) Failed to connect to localhost port 10001: Connection refused What did I do wrong or forget? Thanks for the answer

# 3 years ago

Hello,

I would like to use the rest tango API to develop a web GUI (with Ada Web Server) for a project using tango.
To test the possibility, I installed Tango's 9.3.4 package on a Debian buster. It seems to be ok for most applications (jive, pogo, astor) but not for tangorestserver. There is a java version problem. Version 1.8.x is too old. So I changed in the TangoRestServer bash to a newer version (version 11) and it seems to work.
I followed the explanations given on the link https://github.com/tango-controls/rest-server/wiki by creating a device server with jive then I ran "TangoRestServer test" and I got the following answer:
WARN 2021-02-02 11:36:26,772 [main - - o.t.c.d.Database] org.tango.client.database.Database.<init>:41 - database cache version release 1.13 not supported, please install it to have better performance
INFO 2021-02-02 11:36:26,929 [main - test/rest/0 - o.t.TangoRestServer] org.tango.TangoRestServer.init:145 - Initializing TangoRestServer device…
WARN 2021-02-02 11:36:26,940 [main - test/rest/0 - o.t.s.e.EventManager] org.tango.server.events.EventManager.initializeClientHwm:145 - CtrlSystem/EventBufferHwm property is not a number:
INFO 2021-02-02 11:36:27,025 [main - test/rest/0 - o.t.s.ServerManager] org.tango.server.ServerManager.init:265 - TANGO server TangoRestServer/test started
WARN 2021-02-02 11:36:27,026 [main - test/rest/0 - o.t.s.ServerManagerUtils] org.tango.server.ServerManagerUtils.dumpPID:47 - Failed to create pid file /var/tmp/TangoRestServer/TangoRestServer.pid due to java.nio.file.NoSuchFileException: TangoRestServer.pid
Exception in thread "main" java.lang.RuntimeException: java.nio.file.NoSuchFileException: /var/tmp/TangoRestServer/tomcat_4274159224536421215
at org.tango.web.server.tomcat.TomcatBootstrap.initializeBaseDir(TomcatBootstrap.java:74)
at org.tango.TangoRestServer.startTomcat(TangoRestServer.java:126)
at org.tango.TangoRestServer.main(TangoRestServer.java:118)
Caused by: java.nio.file.NoSuchFileException: /var/tmp/TangoRestServer/tomcat_4274159224536421215
at java.base/sun.nio.fs.UnixException.translateToIOException(UnixException.java:92)
at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111)
at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:116)
at java.base/sun.nio.fs.UnixFileSystemProvider.createDirectory(UnixFileSystemProvider.java:389)
at java.base/java.nio.file.Files.createDirectory(Files.java:689)
at java.base/java.nio.file.TempFileHelper.create(TempFileHelper.java:135)
at java.base/java.nio.file.TempFileHelper.createTempDirectory(TempFileHelper.java:172)
at java.base/java.nio.file.Files.createTempDirectory(Files.java:965)
at org.tango.web.server.tomcat.TomcatBootstrap.initializeBaseDir(TomcatBootstrap.java:64)
… 2 more

I then run the following command in another terminal :

curl -u "tango-cs: tango" http: // localhost: 10001 / tango / rest

and I have the following answer:

curl: (7) Failed to connect to localhost port 10001: Connection refused

What did I do wrong or forget?

Thanks for the answer

# 3 years ago
Ingvord	Looks like your instance of TangoRestServer does not have permissions to create a temporary file/dir, which is required for proper running. Another reason could be insufficient space. Please check those issues. Thanks

# 3 years ago
Ingvord	For your convenience I have updated the wiki page of the rest-server. Cheers,

# 3 years ago
Coacolo	Hi, The rights are 777 and there is enough space

# 3 years ago
Coacolo	It looks like it's good. It was just the TangoRestServer directory (LOG_HOME environment variable from the TangoRestServer bash) which was not created in the /var /tmp directory. I continue !!!!