[jboss-jira] [JBoss JIRA] (WFLY-3574) management API blocking write requests during initialization

[Michael Mutschler (JIRA)]

     [ https://issues.jboss.org/browse/WFLY-3574?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael Mutschler updated WFLY-3574:
------------------------------------

    Steps to Reproduce: 
In this simple example I try to remove the default ExampleDS (it should fail, but the bug is, that I get no result)

Here is the Listener I use:
{code:title=ConfigListener.java|borderStyle=dashed}
@WebListener
public class ConfigListener implements ServletContextListener {

  @Override
  public void contextInitialized(ServletContextEvent servletContextEvent) {
    RemoveExampleDS.run();
  }

  @Override
  public void contextDestroyed(ServletContextEvent servletContextEvent) {}
}
{code}

RemoveExampleDS has the actual code to remove the Datasource:

{code:title=RemoveExampleDS.java|borderStyle=dashed}
public class RemoveExampleDS {
  public static void run() {
    try {
      deleteDataSource("ExampleDS");
    } catch (IOException e) { log(e); }
  }

  private static void deleteDataSource(String dsName) throws IOException {
    log("removing datasource " + dsName);
    final ModelNode request = new ModelNode();
    request.get(ClientConstants.OP).set(ClientConstants.REMOVE_OPERATION);
    request.get(ClientConstants.OP_ADDR).add("subsystem", "datasources");
    request.get(ClientConstants.OP_ADDR).add("data-source", dsName);
    execute(request);
    log("datasource " + dsName + " removed");
  }

  private static void execute(ModelNode request) throws IOException {
    log("connecting to management");
    ModelControllerClient client = ModelControllerClient.Factory.create("localhost", 9990);
    log("executing: " + request);
    ModelNode response = client.execute(request);
    log("response: " + response);
    client.close();
    log(response.get(ClientConstants.RESULT));
  }

  private static void log(Object o) { System.out.println(o); }
}
{code}

I packed this into a war, and it is the only war I am running in a default wildfly installation. 

The log looks like this. Note: there is no response for the remove!
{noformat}
2014-07-02 14:26:54,280 INFO  [stdout] (MSC service thread 1-12) removing datasource ExampleDS
2014-07-02 14:26:54,292 INFO  [stdout] (MSC service thread 1-12) connecting to management
2014-07-02 14:26:54,317 INFO  [stdout] (MSC service thread 1-12) executing: {
2014-07-02 14:26:54,318 INFO  [stdout] (MSC service thread 1-12)     "operation" => "remove",
2014-07-02 14:26:54,319 INFO  [stdout] (MSC service thread 1-12)     "address" => [
2014-07-02 14:26:54,319 INFO  [stdout] (MSC service thread 1-12)         ("subsystem" => "datasources"),
2014-07-02 14:26:54,319 INFO  [stdout] (MSC service thread 1-12)         ("data-source" => "ExampleDS")
2014-07-02 14:26:54,320 INFO  [stdout] (MSC service thread 1-12)     ]
2014-07-02 14:26:54,320 INFO  [stdout] (MSC service thread 1-12) }
2014-07-02 14:26:54,344 INFO  [org.xnio] (MSC service thread 1-12) XNIO version 3.2.2.Final
2014-07-02 14:26:54,359 INFO  [org.xnio.nio] (MSC service thread 1-12) XNIO NIO Implementation Version 3.2.2.Final
{noformat}

  was:
In this simple example I try to remove the default ExampleDS (it should fail, but the bug is, that I get no result)

Here is the Listener I use:
{code:title=ConfigListener.java|borderStyle=dashed}
@WebListener
public class ConfigListener implements ServletContextListener {

  @Override
  public void contextInitialized(ServletContextEvent servletContextEvent) {
    RemoveExampleDS.run();
  }

  @Override
  public void contextDestroyed(ServletContextEvent servletContextEvent) {}
}
{code}

RemoveExampleDS has the actual code to remove the Datasource:

{code:title=RemoveExampleDS.java|borderStyle=dashed}
public class RemoveExampleDS {
  public static void run() {
    try {
      deleteDataSource("ExampleDS");
    } catch (IOException e) { log(e); }
  }

  private static void deleteDataSource(String dsName) throws IOException {
    log("removing datasource " + dsName);
    final ModelNode request = new ModelNode();
    request.get(ClientConstants.OP).set(ClientConstants.REMOVE_OPERATION);
    request.get(ClientConstants.OP_ADDR).add("subsystem", "datasources");
    request.get(ClientConstants.OP_ADDR).add("data-source", dsName);
    execute(request);
    log("datasource " + dsName + " removed");
  }

  private static void execute(ModelNode request) throws IOException {
    log("connecting to management");
    ModelControllerClient client = ModelControllerClient.Factory.create("localhost", 9990);
    log("executing: " + request);
    ModelNode response = client.execute(request);
    log("response: " + response);
    client.close();
    log(response.get(ClientConstants.RESULT));
  }

  private static void log(Object o) { System.out.println(o); }
}
{code}

I packed this into a war, and it is the only war I am running in a default wildfly installation. 

The log looks like this. Note: there is no response for the remove!
{{
2014-07-02 14:26:54,280 INFO  [stdout] (MSC service thread 1-12) removing datasource ExampleDS
2014-07-02 14:26:54,292 INFO  [stdout] (MSC service thread 1-12) connecting to management
2014-07-02 14:26:54,317 INFO  [stdout] (MSC service thread 1-12) executing: {
2014-07-02 14:26:54,318 INFO  [stdout] (MSC service thread 1-12)     "operation" => "remove",
2014-07-02 14:26:54,319 INFO  [stdout] (MSC service thread 1-12)     "address" => [
2014-07-02 14:26:54,319 INFO  [stdout] (MSC service thread 1-12)         ("subsystem" => "datasources"),
2014-07-02 14:26:54,319 INFO  [stdout] (MSC service thread 1-12)         ("data-source" => "ExampleDS")
2014-07-02 14:26:54,320 INFO  [stdout] (MSC service thread 1-12)     ]
2014-07-02 14:26:54,320 INFO  [stdout] (MSC service thread 1-12) }
2014-07-02 14:26:54,344 INFO  [org.xnio] (MSC service thread 1-12) XNIO version 3.2.2.Final
2014-07-02 14:26:54,359 INFO  [org.xnio.nio] (MSC service thread 1-12) XNIO NIO Implementation Version 3.2.2.Final
}}



> management API blocking write requests during initialization
> ------------------------------------------------------------
>
>                 Key: WFLY-3574
>                 URL: https://issues.jboss.org/browse/WFLY-3574
>             Project: WildFly
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: CLI
>    Affects Versions: 8.1.0.Final
>         Environment: default configuration
>            Reporter: Michael Mutschler
>            Assignee: Alexey Loubyansky
>            Priority: Critical
>
> I want to apply some configuration before the real application is starting. Mainly I want to update a datasource. Therefore I wrote a WebListener, and during the initialization I want to modify the wildfly configuration via management API.
> I can read the configuration, but when I want to execute a delete or add request, nothing happens; the command does not return! There seems to be a deadlock.



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