我正在使用spring 4.2.0和nifi 0.6.0，当我使用RestTemplate调用restful api来禁用nifi的控制器服务时
//get nifi revision
public RevisionDTO getRevision() {
Entity revision = restTemplate.getForObject("http://localhost:8083/nifi-api//controller/revision", Entity.class);
return revision.getRevision();
}
//http parameter
protected Map<String, Object> getRevisionUrl(RevisionDTO revision) {
Map<String, Object> urlVar = new HashMap<String, Object>();
urlVar.put("version", revision.getVersion());
urlVar.put("clientId", revision.getClientId());
return urlVar;
}
//disable controller service
private void disable(ControllerServiceEntity cs) {
Map<String, Object> urlVar = getRevisionUrl(getRevision());
urlVar.put("state", STATE_DISABLED);
restTemplate.put("http://localhost:8083/nifi-api/controller/controller-services/node/" + cs.getControllerService().getId(), null, urlVar);
}
我收到了以下错误日志：
org.springframework.web.client.HttpClientErrorException: 409 Conflict
at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:91)
at org.springframework.web.client.RestTemplate.handleResponse(RestTemplate.java:636)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:592)
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:560)
nifi log
2016-04-11 16:32:53,982 DEBUG [NiFi Web Server-90 - /nifi-api/controller/controller-services/node/5d99ca33-78f6-465e-9ab1-8c7cb5650025] o.a.n.w.StandardOptimisticLockingManager Revision check failed because current revision is [23, 5d4fe4d3-2f32-4a75-899a-458e8e62efce] but supplied revision is [null, 15976fcf-e01b-483c-994b-df812293d7ad]
......
2016-04-11 16:32:53,990 DEBUG [NiFi Web Server-90 - /nifi-api/controller/controller-services/node/5d99ca33-78f6-465e-9ab1-8c7cb5650025] c.s.j.spi.container.ContainerResponse Mapped exception to response: 409 (Conflict)
org.apache.nifi.web.InvalidRevisionException: This NiFi instance has been updated by 'anonymous'. Please refresh to synchronize the view.
at org.apache.nifi.web.StandardOptimisticLockingManager.checkRevision(StandardOptimisticLockingManager.java:62) ~[nifi-web-optimistic-locking-0.6.0.jar:0.6.0]
at org.apache.nifi.web.StandardOptimisticLockingManager.configureFlow(StandardOptimisticLockingManager.java:80) ~[nifi-web-optimistic-locking-0.6.0.jar:0.6.0]
at org.apache.nifi.web.StandardNiFiServiceFacade.updateControllerService(StandardNiFiServiceFacade.java:1714) ~[classes/:0.6.0]
at org.apache.nifi.web.StandardNiFiServiceFacade$$FastClassBySpringCGLIB$$358780e0.invoke() ~[classes/:0.6.0]
browser call disabled api screenshot
有没有办法解决错误？
@Matt Gilman我已经以两种方式更改了disable功能：
private void disable(ControllerServiceEntity cs) {
//http form
/*MultiValueMap<String, String> urlVar = getRevisionUrl(getRevision());
urlVar.add("state", STATE_DISABLED);
HttpHeaders requestHeaders = new HttpHeaders();
requestHeaders.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
HttpEntity<MultiValueMap<String, String>> requestEntity = new HttpEntity<MultiValueMap<String, String>>(urlVar, requestHeaders);*/
//http json
ControllerServiceEntity csu = new ControllerServiceEntity();
csu.setRevision(getRevision());
csu.setControllerService(cs.getControllerService());
csu.getControllerService().setState(STATE_DISABLED);
HttpHeaders requestHeaders = new HttpHeaders();
requestHeaders.setContentType(MediaType.APPLICATION_JSON);
HttpEntity<String> requestEntity = new HttpEntity<String>(JSONUtils.obj2json(csu), requestHeaders);
restTemplate.put(url() + cs.getControllerService().getId(), requestEntity);
}
但我在nifi中遇到了同样的错误：
java.lang.IllegalStateException: DBCPConnectionPool[id=fecc88a8-379d-4fb3-b880-28c5f5caef23] cannot be updated because it is not disabled
at org.apache.nifi.controller.service.StandardControllerServiceNode.verifyCanUpdate(StandardControllerServiceNode.java:217) ~[nifi-framework-core-0.6.0.jar:0.6.0]
at org.apache.nifi.web.dao.impl.StandardControllerServiceDAO.verifyUpdate(StandardControllerServiceDAO.java:225) ~[classes/:na]
at org.apache.nifi.web.dao.impl.StandardControllerServiceDAO.updateControllerService(StandardControllerServiceDAO.java:101) ~[classes/:na]
解决
我再次比较浏览器禁用请求和读取api doc，发现禁用控制器服务必须遵循以下步骤：
现在我的新禁用功能是
private void disable(ControllerServiceEntity cs) {
//http form
HttpHeaders requestHeaders = new HttpHeaders();
requestHeaders.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
//stop controller service reference
MultiValueMap<String, String> urlVar = getRevisionUrl(getRevision());
urlVar.add("state", STATE_STOPPED);
HttpEntity<MultiValueMap<String, String>> requestEntity = new HttpEntity<MultiValueMap<String, String>>(urlVar, requestHeaders);
restTemplate.put(url() + cs.getControllerService().getId() + "/references", requestEntity);
//disable controller service reference
urlVar = getRevisionUrl(getRevision());
requestEntity = new HttpEntity<MultiValueMap<String, String>>(urlVar, requestHeaders);
urlVar.add("state", STATE_DISABLED);
restTemplate.put(url() + cs.getControllerService().getId() + "/references", requestEntity);
//set controller service disable state
urlVar = getRevisionUrl(getRevision());
requestEntity = new HttpEntity<MultiValueMap<String, String>>(urlVar, requestHeaders);
urlVar.add("state", STATE_DISABLED);
restTemplate.put(url() + cs.getControllerService().getId(), requestEntity);
}
答案 0 :(得分：3)
当收到您的请求时，似乎没有解释修订版。我之前见过这一次，当时请求的Content-Type设置不正确，因此修订版没有正确解析。
我对RestTemplate不是很熟悉，但是来自浏览器的开发者工具的请求的内容类型为application/x-www-form-urlencoded。你能检查一下RestTemplate发出的是同一类型的请求吗？
或者，您可以直接使用Object发出请求并使用application/json。虽然这里略有不同，但是使用客户端DTO [1]设置处理器预定状态的示例。
此外，本文的底部是修订用例[2]的一个很好的序列图。
[2] https://community.hortonworks.com/content/kbentry/3160/update-nifi-flow-on-the-fly-via-api.html