java.lang.NoSuchMethodError: org.json.JSONObject.putOnce(...

[ghost]

I can retrieve Users, Projects, Issues etc..
but when I try to insert a new Issue:

Issue issue  = IssueFactory.create(projectTest.getId, "Test INSERT")
issueManager.createIssue(issue)

i get:

18:10:13.740 [http-nio-8080-exec-10] WARN  com.bqn.backoffice.redmine - Issue [id=null, subject=Test de INSERT]
java.lang.NoSuchMethodError: org.json.JSONObject.putOnce(Ljava/lang/String;Ljava/lang/Object;)Lorg/json/JSONObject;
    at org.json.JSONWriter.key(JSONWriter.java:210) ~[json-20090211.jar:0.0.20131108.vaadin1]
    at com.taskadapter.redmineapi.internal.RedmineJSONBuilder.toSimpleJSON(RedmineJSONBuilder.java:220) ~[redmine-java-api-2.4.0.jar:na]
    at com.taskadapter.redmineapi.internal.Transport.addObject(Transport.java:220) ~[redmine-java-api-2.4.0.jar:na]
    at com.taskadapter.redmineapi.IssueManager.createIssue(IssueManager.java:173) ~[redmine-java-api-2.4.0.jar:na]

[ghost]

Environment:
Redmine version 3.1.1.stable
Ruby version 1.9.3-p484 (2013-11-22) [x86_64-linux]
Rails version 4.2.4

[ghost]

18:05:58.234 [http-nio-8080-exec-10] DEBUG c.t.r.internal.comm.BaseCommunicator - GET http://localhost:3000//projects/test.json?include=trackers&key=ca7a15f89d1d753646538a186ef6de5754118881 HTTP/1.1
18:05:58.335 [http-nio-8080-exec-10] DEBUG c.t.redmineapi.RedmineManager - {"project":{"id":1,"name":"Test","identifier":"test","description":"","homepage":"","status":1,"trackers":[{"id":1,"name":"Bug"},{"id":2,"name":"Feature"},{"id":3,"name":"Support"}],"created_on":"2015-10-06T19:14:39Z","updated_on":"2015-10-06T19:14:39Z"}}
18:05:59.002 [http-nio-8080-exec-10] DEBUG c.t.r.internal.comm.BaseCommunicator - GET http://localhost:3000//issues/1.json?include=null&key=ca7a15f89d1d753646538a186ef6de5754118881 HTTP/1.1
18:05:59.051 [http-nio-8080-exec-10] DEBUG c.t.redmineapi.RedmineManager - {"issue":{"id":1,"project":{"id":1,"name":"Test"},"tracker":{"id":1,"name":"Bug"},"status":{"id":1,"name":"New"},"priority":{"id":2,"name":"Normal"},"author":{"id":6,"name":"BackOffice BQN"},"subject":"prueba","description":"","start_date":"2015-10-06","done_ratio":0,"spent_hours":0.0,"created_on":"2015-10-06T19:23:49Z","updated_on":"2015-10-06T19:23:49Z"}}

[alexeyOnGitHub]

my first guess would be that you have some incompatible version of json library in the classpath.
I see "json-20090211.jar:0.0.20131108.vaadin1" in your output. what is that? is it some custom version of json library packed with vaadin?

[ghost]

Like you said it was an incompatibility library dependenci between two modules I've been using.

Tks.

[alexeyOnGitHub]

it may be helpful to other developers if you provide a brief description on how you identified the duplicate jar...

[cudu]

this code will help u

<dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
      <exclusions>
        <exclusion>
          <groupId>com.vaadin.external.google</groupId>
          <artifactId>android-json</artifactId>
        </exclusion>
      </exclusions>
    </dependency>