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java.nio.charset.IllegalCharsetNameException: "utf-8" at java.nio.charset.Charset.checkName(Charset.java:284) at java.nio.charset.Charset.lookup2(Charset.java:458) at java.nio.charset.Charset.lookup(Charset.java:437) at java.nio.charset.Charset.forName(Charset.java:502) at org.springframework.http.MediaType.checkParameters(MediaType.java:300) at org.springframework.http.MediaType.<init>(MediaType.java:266) at org.springframework.http.MediaType.parseMediaType(MediaType.java:570) at org.springframework.http.HttpHeaders.getContentType(HttpHeaders.java:286) at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:64) at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:619) at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:1) at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:446) at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:401) at org.springframework.web.client.RestTemplate.getForEntity(RestTemplate.java:221)