private void setChunkException(RouterException exception) {
      chunkException = exception;
    }
Possibly set the exception for this chunk using the given exception. Calling this method with an exception does
not necessarily result in that being set as the chunkException. The idea is to set the most relevant exception
in case of errors.
@param exception the exception that may be set as the chunkException.
ambry-router/src/main/java/com/github/ambry/router/PutOperation.java