Hystrix不引发HystrixRuntimeException，而是空消息错误

Question

I use Hystrix (version Camden.SR7 of spring-cloud-dependencies ) in spring-boot app on service layer without fallback methods. One of service's method looks like the following:

@HystrixCommand(commandKey = "prefs",
        commandProperties = { @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "2000")})
@Override
public void savePrefs(PrefsRequestParams requestParams) throws Exception {
    ...
}

If such method executes longer than 2 seconds, Hystrix will throw java.util.concurrent.TimeoutException: null, and REST response will look like:

{
    "timestamp": 1509452672714,
    "status": 500,
    "error": "Internal Server Error",
    "exception": "java.util.concurrent.TimeoutException",
    "message": "No message available",
    "path": "/prefs"
}

With such response it's unclear from which method exception actually was thrown. If I change spring-cloud-dependencies version to Brixton.SR5 (previous version), it returns clear response:

{
    "timestamp": 1509452426819,
    "status": 500,
    "error": "Internal Server Error",
    "exception": "com.netflix.hystrix.exception.HystrixRuntimeException",
    "message": "prefs timed-out and fallback failed.",
    "path": "/prefs"
}

So new version of Hystrix (actually new version of spring-cloud-dependencies) does not throw HystrixRuntimeException. Is it a bug or should I configure Hystrix in another way to receive clear message error?

I use the following maven dependencies:

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-hystrix</artifactId>
    <version>1.2.7.RELEASE</version>
</dependency>

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>Camden.SR7</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
     ...

from maven dependency tree I see that it uses com.netflix.hystrix:hystrix-core:jar:1.5.6:compile for spring-cloud-dependencies version Camden.SR7, and for version Brixton.SR5 - com.netflix.hystrix:hystrix-core:jar:1.5.3:compile .

Answer 1

Updating to Javanica 1.5.12 resolves the issue.

From 1.5.7 there is also an option to force throwing HystrixRuntimeException for all not ignored exceptions:

@HystrixCommand(raiseHystrixExceptions = {HystrixException.RUNTIME_EXCEPTION})
@Override
public void savePrefs(PrefsRequestParams requestParams) throws Exception {
    ...
}