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way to solve "Query failed with error code 2 and error message 'Field 'locale' is invalid in: { locale: "roles" }'" exception

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If you find the following exception: ``` Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.data.mongodb.UncategorizedMongoDbException: Query failed with error code...

notes for security/jwt/JwtUtils.java

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This issue record the problems in programming, and the solutions that I used. In _security/jwt/JwtUtils.java_ `.signWith(SignatureAlgorithm.HS512, jwtSecret)` will use `JwtBuilder signWith(SignatureAlgorithm alg, String base64EncodedSecretKey) throws InvalidKeyException;` method. This method will...

About wstan's weakness

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Maybe you can get some inspiration from this [url](http://www.52im.net/thread-310-1-1.html) ?