spring - RestTemplate postForEntity experiencing java.io.IOException: Premature EOF error -

would appreciate regarding issue on 1 of maven projects.

exception in thread "main" org.springframework.web.client.resourceaccessexception: i/o error on post request "https://test-services.domain.ph/campaign/": premature eof; nested exception java.io.ioexception: premature eof @ org.springframework.web.client.resttemplate.doexecute(resttemplate.java:666) @ org.springframework.web.client.resttemplate.execute(resttemplate.java:613) @ org.springframework.web.client.resttemplate.postforentity(resttemplate.java:407) @ homecredit.ph.campaignconnector.call(campaignconnector.java:46) caused by: java.io.ioexception: premature eof @ sun.net.www.http.chunkedinputstream.readaheadblocking(chunkedinputstream.java:565) @ sun.net.www.http.chunkedinputstream.readahead(chunkedinputstream.java:609) @ sun.net.www.http.chunkedinputstream.read(chunkedinputstream.java:696) @ java.io.filterinputstream.read(filterinputstream.java:133) 

origin:

responseentity<apiresponse> response = resttemplate.postforentity(url, entity, apiresponse.class); 

destination:

@requestmapping(value="/campaign", method = requestmethod.post, consumes=mediatype.application_json_value) public responseentity<apiresponse> insertcampaignrecord(         @valid @requestbody campaignrecordinsertrequest campaignrecordinsertrequest){     loginfo("incoming insert request. " + descriptorutility.converttostring(campaignrecordinsertrequest));     campaigndataservice.insertnewrecord(campaignrecordconverter.converttocampaignrecord(campaignrecordinsertrequest));     return responseutility.defaultresponse(); } 

responseutility

public static responseentity<apiresponse> defaultresponse(){     apiresponse apiresponse = new apiresponse();     apiresponse.settimestamp(dateutility.currentdatestring());     apiresponse.setmessage(responsemessages.success);     return new responseentity<>(apiresponse, httpstatus.ok); } 

campaigndata service

@async("asyncexecutor") public void insertnewrecord(campaignrecord campaignrecord) {     try {         campaignrecordrepository.save(campaignrecord);     } catch (exception e) {         logerror(e);     } } 

server log

2017-09-11 11:11:11  info 18383 [http-nio-8773-exec-10] [campaignrecordcontroller] - incoming insert request. {"datecampaign":1504656000000,"cuid":... 2017-09-11 11:11:11  warn 18383 [http-nio-8773-exec-10] [sqlexceptionhelper] - sql error: 1062, sqlstate: 23000 2017-09-11 11:11:11 error 18383 [http-nio-8773-exec-10] [sqlexceptionhelper] - duplicate entry 'cmp_clx##1208637#20170906' key 'unique_key' 2017-09-11 11:11:11 error 18383 [http-nio-8773-exec-10] [campaigndataservice] - not execute statement; sql [n/a]; constraint [null]; nested exception org.hibernate.exception.constraintviolationexception: not execute statement 2017-09-11 11:11:11 error 18383 [http-nio-8773-exec-10] [campaigndataservice] - not execute statement 

ps. server logs normal(return successful response either record saved or not)

issue intermittent. occurs randomly when sending bulk requests.

thanks in advance! :)

based on server logs seems like, server trying save record , failing (due unique key violation).

2017-09-11 11:11:11  warn 18383 [http-nio-8773-exec-10] [sqlexceptionhelper] - sql error: 1062, sqlstate: 23000 2017-09-11 11:11:11 error 18383 [http-nio-8773-exec-10] [sqlexceptionhelper] - duplicate entry 'cmp_clx##1208637#20170906' key 'unique_key' 2017-09-11 11:11:11 error 18383 [http-nio-8773-exec-10] [campaigndataservice] - not execute statement; sql [n/a]; constraint [null]; nested exception org.hibernate.exception.constraintviolationexception: not execute statement 2017-09-11 11:11:11 error 18383 [http-nio-8773-exec-10] [campaigndataservice] - not execute statement 

looks server not able handle exception gracefully , whole flow breaks, causing http-500 response code (probably) empty response.

two actions can take:

1. handle exception gracefully.
2. verify why unique key getting violated , fix if possible.