Each time I fire the DELETE request I first GET the ProcessGroup details and then fetch the *version*. So I am passing the correct version in DELETE request.
Thanks, -Nirmal From: Matt Gilman [mailto:matt.c.gil...@gmail.com] Sent: Wednesday, December 7, 2016 12:37 AM To: users@nifi.apache.org Subject: Re: Getting org.springframework.web.client.HttpClientErrorException: 409 Conflict on DELETE ProcessGroup I'm not familiar with Spring RestTemplate but I'm sure they offer the ability to get at the response body. Maybe it's possible to implement a custom error handler or something. Without knowing more, I could venture a guess that your requests are failing intermittently because you not passing along the correct revision. NiFi employs an optimistic locking model whereby clients pass along a revision version to indicate that currently hold the most update to date version of that component. Here a blog that details this and provides a nice sequence diagram to help visualize it [1]. The relevant details are towards the bottom. Matt [1] https://community.hortonworks.com/content/kbentry/3160/update-nifi-flow-on-the-fly-via-api.html On Tue, Dec 6, 2016 at 1:53 PM, Nirmal Kumar <nirmal.ku...@impetus.co.in<mailto:nirmal.ku...@impetus.co.in>> wrote: Thanks but as I calling it programmatically using Spring RestTemplate I just get the stack trace as mentioned in my below mail. -Nirmal From: Matt Gilman [mailto:matt.c.gil...@gmail.com<mailto:matt.c.gil...@gmail.com>] Sent: Tuesday, December 6, 2016 6:58 PM To: users@nifi.apache.org<mailto:users@nifi.apache.org> Subject: Re: Getting org.springframework.web.client.HttpClientErrorException: 409 Conflict on DELETE ProcessGroup Nirmal, If you consume the body of the response it should indicate the reason for the 409. On failed responses, the response body should be text/plain. Let me know if that helps. Thanks Matt On Mon, Dec 5, 2016 at 11:29 PM, Nirmal Kumar <nirmal.ku...@impetus.co.in<mailto:nirmal.ku...@impetus.co.in>> wrote: Hi All, I am getting the following exception *intermittently* when firing a DELETE request for deleting the Process group: http://xxx.xxx.xxx.xxx:9091/nifi-api/process-groups/103111c4-123b-14f9-a794-14795038dbdf?version=0 org.springframework.web.client.HttpClientErrorException: 409 Conflict at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:91) ~[nifi-util-1.0.0.jar:na] at org.springframework.web.client.RestTemplate.handleResponseError(RestTemplate.java:615) ~[nifi-util-1.0.0.jar:na] at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:573) ~[nifi-util-1.0.0.jar:na] at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:529) ~[nifi-util-1.0.0.jar:na] at org.springframework.web.client.RestTemplate.delete(RestTemplate.java:401) ~[nifi-util-1.0.0.jar:na] I am using Nifi 1.0.0 version. Not sure if setting these timeout will help here: public RestTemplate restTemplate() { return new RestTemplate(clientHttpRequestFactory()); } private ClientHttpRequestFactory clientHttpRequestFactory() { HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory(); factory.setReadTimeout(2000); factory.setConnectTimeout(2000); return factory; } Any pointers here would be great. Thanks, -Nirmal ________________________________ NOTE: This message may contain information that is confidential, proprietary, privileged or otherwise protected by law. The message is intended solely for the named addressee. If received in error, please destroy and notify the sender. Any use of this email is prohibited when received in error. Impetus does not represent, warrant and/or guarantee, that the integrity of this communication has been maintained nor that the communication is free of errors, virus, interception or interference. ________________________________ NOTE: This message may contain information that is confidential, proprietary, privileged or otherwise protected by law. The message is intended solely for the named addressee. If received in error, please destroy and notify the sender. Any use of this email is prohibited when received in error. Impetus does not represent, warrant and/or guarantee, that the integrity of this communication has been maintained nor that the communication is free of errors, virus, interception or interference. ________________________________ NOTE: This message may contain information that is confidential, proprietary, privileged or otherwise protected by law. The message is intended solely for the named addressee. If received in error, please destroy and notify the sender. Any use of this email is prohibited when received in error. Impetus does not represent, warrant and/or guarantee, that the integrity of this communication has been maintained nor that the communication is free of errors, virus, interception or interference.
