/**
 * The MIT License
 * Copyright (c) 2014-2015 Nick Guletskii
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.ng200.openolympus.controller.errors;

import org.ng200.openolympus.exceptions.GeneralNestedRuntimeException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Profile;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.http.HttpStatus;
import org.springframework.web.HttpMediaTypeNotAcceptableException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.ResponseStatus;

@ControllerAdvice
@Profile("web")
@Order(Ordered.LOWEST_PRECEDENCE)
public class ExceptionHandlingController {

	private static final Logger logger = LoggerFactory
			.getLogger(ExceptionHandlingController.class);
	@ExceptionHandler(Exception.class)
	@ResponseBody
	@ResponseStatus(value = HttpStatus.INTERNAL_SERVER_ERROR)
	public String handleException(Exception ex) {
		ExceptionHandlingController.logger.error("Handling error:", ex);
		return ex.getMessage();
	}

	@ExceptionHandler(HttpMediaTypeNotAcceptableException.class)
	@ResponseBody
	@ResponseStatus(value = HttpStatus.INTERNAL_SERVER_ERROR)
	public String handleException(HttpMediaTypeNotAcceptableException ex) {
		ExceptionHandlingController.logger.error("Bad media types:", ex);
		ExceptionHandlingController.logger.error("Supported media types: {}",
				ex.getSupportedMediaTypes());
		return ex.getMessage();
	}

	@ExceptionHandler(GeneralNestedRuntimeException.class)
	@ResponseStatus(value = HttpStatus.INTERNAL_SERVER_ERROR)
	public String handleNestedException(GeneralNestedRuntimeException ex)
			throws Throwable {
		throw ex.getCause();
	}

}

/**
 * The MIT License
 * Copyright (c) 2014-2015 Nick Guletskii
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.ng200.openolympus.controller.errors;

import org.ng200.openolympus.exceptions.GeneralNestedRuntimeException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Profile;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.http.HttpStatus;
import org.springframework.web.HttpMediaTypeNotAcceptableException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.ResponseStatus;

@ControllerAdvice
@Profile("web")
@Order(Ordered.LOWEST_PRECEDENCE)
public class ExceptionHandlingController {

	private static final Logger logger = LoggerFactory
			.getLogger(ExceptionHandlingController.class);
	@ExceptionHandler(Exception.class)
	@ResponseBody
	@ResponseStatus(value = HttpStatus.INTERNAL_SERVER_ERROR)
	public String handleException(Exception ex) {
		ExceptionHandlingController.logger.error("Handling error:", ex);
		return ex.getMessage();
	}

	@ExceptionHandler(HttpMediaTypeNotAcceptableException.class)
	@ResponseBody
	@ResponseStatus(value = HttpStatus.INTERNAL_SERVER_ERROR)
	public String handleException(HttpMediaTypeNotAcceptableException ex) {
		ExceptionHandlingController.logger.error("Bad media types:", ex);
		ExceptionHandlingController.logger.error("Supported media types: {}",
				ex.getSupportedMediaTypes());
		return ex.getMessage();
	}

	@ExceptionHandler(GeneralNestedRuntimeException.class)
	@ResponseBody
	@ResponseStatus(value = HttpStatus.INTERNAL_SERVER_ERROR)
	public String handleNestedException(GeneralNestedRuntimeException ex)
			throws Throwable {
		throw ex.getCause();
	}

}

Add @ResponseBody to nested exception handler