java error

sun.reflect.GeneratedConstructorAccessor248.newInstance(Unknown Source)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
java.lang.reflect.Constructor.newInstance(Constructor.java:423)
sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
java.security.AccessController.doPrivileged(Native Method)
sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
sun.net.www.protocol.http.HttpURLConnection.getHeaderFieldKey(HttpURLConnection.java:3114)
org.springframework.http.client.SimpleClientHttpResponse.getHeaders(SimpleClientHttpResponse.java:74)
org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:117)
org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:102)
org.springframework.web.client.ResponseErrorHandler.handleError(ResponseErrorHandler.java:63)
org.springframework.web.client.RestTemplate.handleResponse(RestTemplate.java:778)
org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:736)
org.springframework.web.client.RestTemplate.execute(RestTemplate.java:670)
org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:579)
com.goota.pos.core.adaptor.PosAdaptor.execute(PosAdaptor.java:49)
com.goota.pos.trade.service.PaySalesService.lambda$null$3(PaySalesService.java:186)
java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1384)
java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:647)
com.goota.pos.trade.service.PaySalesService.lambda$placeVoucher$4(PaySalesService.java:171)
java.lang.Thread.run(Thread.java:748)