Spike Arrest gives an execution error if placed after a Javascript policy with org level resource URL

[#1]

Hello,

Spike Arrest policy

<SpikeArrest name="Spike-Arrest-1" > 
  <DisplayName>Spike Arrest-1</DisplayName>
  <Rate>60pm</Rate>
</SpikeArrest>

Javascript policy right before Spike Arrest.

<Javascript timeLimit="200" name="rate-limit-config"> 
  <DisplayName>rate-limit-config</DisplayName>
  <Properties/>
  <ResourceURL>jsc://rate-limit-config.js</ResourceURL>
</Javascript>

rate-limit-config.js is at the org level.

The Javascript policy works fine. I could see all its properties as expected in the trace.

Stack trace:

Path : /organizations/xyz/maskconfigs/default . Returning empty DebugMaskDataConfigurationBean
2018-08-07 10:43:12,655 org:xyz env:staging api:workspaces-nodejs rev:4 messageid:wdst2vapg22-39559-30681-1 Apigee-Main-8 ERROR MESSAGING.FLOW - AbstractAsyncExecutionStrategy$AsyncExecutionTask.call() : Exception caught java.lang.NullPointerException: null at
com.apigee.steps.ratelimit.RateLimitExecution.enforceSpikeArrest(RateLimitExecution.java:141) ~[ratelimit-1.0.0.jar:na] at
com.apigee.steps.ratelimit.RateLimitExecution.execute(RateLimitExecution.java:102) ~[ratelimit-1.0.0.jar:na] at
com.apigee.messaging.runtime.steps.StepExecution.execute(StepExecution.java:146) ~[message-processor-1.0.0.jar:na] at
com.apigee.flow.execution.AbstractAsyncExecutionStrategy$AsyncExecutionTask.call(AbstractAsyncExecutionStrategy.java:74) [message-flow-1.0.0.jar:na] at
com.apigee.flow.execution.AbstractAsyncExecutionStrategy$AsyncExecutionTask.call(AbstractAsyncExecutionStrategy.java:45) [message-flow-1.0.0.jar:na] at
java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_144] at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_144] at
java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_144] at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_144] at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)[na:1.8.0_144] at
java.lang.Thread.run(Thread.java:748) [na:1.8.0_144]


2018-08-07 10:43:14,714 IoReceiver - /172.24.20.212:5672 ERROR o.a.q.c.AMQConnection - AMQConnection.deliverJMSExceptionToExceptionListenerOrLog() : Throwable Received but no listener set: org.apache.qpid.AMQException: ch=0 id=0 ExecutionException(errorCode=NOT_FOUND, commandId=0, classCode=7, commandCode=1, fieldIndex=0, description=not-found: Exchange type not implemented: (/builddir/build/BUILD/qpid-cpp-1.37.0/src/qpid/broker/SessionAdapter.cpp:104), errorInfo={}) [error code 404: not found]

I have attached an image describing the sequence of the policies.

If I remove the JS policy, Spike Arrest works fine, without any execution error..

Hoping to get a solution for this.

Thanks.

[vineet_vineetb]

can u share the api-proxy code?

[#3]

I am using it in a shared flow. But even if I use it in an api-proxy, the error is still the same.

[dchiesa1]

I can't be certain exactly what is causing the problem, without knowing the version of the software you are running.

But I think the general cause looks likely to be: you are overwriting a variable that the SpikeArrest policy is depending on.

I haven't see your JS code, but ... I suspect that you are writing variables from within JS. Try changing the names of the variables. For example, replace all use of dot (.) with underscore (_) in the variables you set, from within JavaScript.

If that does not change things, then I want to see the list of variables you are setting within the JS policy. You can get that from the Trace UI.

[#5]

Thank you for replying. The version is 4.18.01.

This is my JS code

/*
Rate config for throttling all v2 APIs

To change the rate for any env, modify the "rate" property
 */

var env = context.getVariable('environment.name');
var rate_value = "60pm";
var clientId = context.getVariable('client_id');
var rateConf = {
    "dev2": {
        "enable": true,
        "rate": rate_value
    },
    "dev3": {
        "enable": true,
        "rate": rate_value
    },
    "dev4": {
        "enable": true,
        "rate": rate_value
    },
    "qc": {
        "enable": true,
        "rate": rate_value
    },
    "qc2": {
        "enable": true,
        "rate": rate_value
    },
    "qc3": {
        "enable": true,
        "rate": rate_value
    },
    "qc4": {
        "enable": true,
        "rate": rate_value
    },
    "apict": {
        "enable": true,
        "rate": rate_value
    },
    "preview": {
        "enable": true,
        "rate": rate_value
    },
    "preview2": {
        "enable": true,
        "rate": rate_value
    },
    "staging": {
        "enable": true,
        "rate": rate_value
    },
    "staging2": {
        "enable": true,
        "rate": rate_value
    },
    "prod": {
        "enable": true,
        "rate": rate_value
    },
    "prod-wdl": {
        "enable": true,
        "rate": rate_value
    }
};

context.setVariable('get_rate', rateConf[env].rate);
context.setVariable('throttle', rateConf[env].enable);