java.nio.charset.MalformedInputException: Input length = 1

This exception is thrown by the Java NIO CharsetDecoder when it encounters an input byte sequence that is invalid for the given character set. In other words, the input data contains a byte that cannot be decoded into a valid character.

The "Input length = 1" part of the exception message indicates that the invalid input consists of a single byte. The byte may be an unrecognized character, an incomplete or truncated character sequence, or a byte that is not valid for the specified character set.

To fix this issue, you need to identify the source of the invalid input and either correct it or handle it appropriately. This may involve validating the input data before attempting to decode it, using a different character set, or implementing error handling to gracefully handle invalid input.