Why this method fails to NoSuchMethodError with getSprintManager().deleteSprint(sprint)?

Jira Development Jira Server
1 
try {
ServiceOutcome<Sprint> sprintToDelete = getSprintManager().getSprint(sprint.getId());
sprintDelete = (Sprint) sprintToDelete.getValue();
}
catch (InvalidSyntaxException e)
{
System.out.println("Got an SearchException: " + e.getCause());
}
					
try {
this.deleteSprint(sprintDelete);
}
catch (InvalidSyntaxException e)
{
System.out.println("Got an SearchException: " + e.getCause());
}

void deleteSprint(final Sprint sprint) throws InvalidSyntaxException {
		final ServiceOutcome<Void> delete = getSprintManager().deleteSprint(sprint);
	}

Here is context:

private SprintHelper getSprintHelper() throws InvalidSyntaxException {

		ApplicationContext appCtx = (ApplicationContext) getGreenHopperAppCtx();
		if (appCtx != null) {
			return (SprintHelper) appCtx.getBean("sprintHelper");
		}
		return null;
	}

	private SprintManager getSprintManager() throws InvalidSyntaxException {

		ApplicationContext appCtx = (ApplicationContext) getGreenHopperAppCtx();
		if (appCtx != null) {
			return (SprintManager) appCtx.getBean("sprintManagerImpl");
		}
		return null;
	}
	
	private SprintService getSprintService() throws InvalidSyntaxException {

		ApplicationContext appCtx = (ApplicationContext) getGreenHopperAppCtx();
		if (appCtx != null) {
			return (SprintService) appCtx.getBean("sprintServiceImpl");
		}
		return null;
	}

	private JqlHelper getJqlHelper() throws InvalidSyntaxException {

		ApplicationContext appCtx = (ApplicationContext) getGreenHopperAppCtx();
		if (appCtx != null) {
			return (JqlHelper) appCtx.getBean("jqlHelper");
		}
		return null;
	}

	private Object getGreenHopperAppCtx() throws InvalidSyntaxException {
		OsgiContainerManager osgi = ComponentAccessor.getComponentOfType(OsgiContainerManager.class);
		if (osgi == null) {
			java.lang.System.out.println("OSGI Not Found");
			return null;
		}

		Bundle[] bundles = osgi.getBundles();

		for (int i = 0; i < bundles.length; i++) {
			Bundle bundle = bundles[i];

			if ("com.pyxis.greenhopper.jira".equals(bundle.getSymbolicName())) {

				BundleContext bctx = bundle.getBundleContext();
				ServiceReference[] refs = bctx.getAllServiceReferences(null, null);
				if (refs != null) {
					for (int j = 0; j < refs.length; j++) {
						Object prop = refs[j].getProperty("org.springframework.context.service.name");
						if ("com.pyxis.greenhopper.jira".equals(prop)) {
							return bctx.getService(refs[j]);
						}

					}
				}
			}
		}
		return null;
	}

And here is a error:

2020-10-30 05:43:37,867+0000 http-nio-8080-exec-5 ERROR      [c.a.j.web.servlet.InternalServerErrorServlet] {errorId=aa2b6339-63cf-419b-833b-4257154a962a, interpretedMsg=, cause=java.lang.NoSuchMethodError: com.atlassian.greenhopper.service.sprint.SprintManager.deleteSprint(Lcom/atlassian/greenhopper/service/sprint/Sprint;)Lcom/atlassian/greenhopper/service/ServiceOutcome;, 
    	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_202]
    , referer=https://jira.i4ware.fi/secure/SprintsDashboard.jspa, servletErrorMessage=}
2

Please add the error message/stack trace. Which method is throwing? What is this in this context?

3

I added all you asked.

And if I try to use this instead then bean sprintServiceImpl not found:

private SprintService getSprintService() throws InvalidSyntaxException {

		ApplicationContext appCtx = (ApplicationContext) getGreenHopperAppCtx();
		if (appCtx != null) {
			return (SprintService) appCtx.getBean("sprintServiceImpl");
		}
		return null;
	}

SprintService also includes a deleteSprint(user, sprint, RapidViewid);

4

Sorry I forget, this calls a function below: