Response Cache policy deployment error troubleshooting

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InvalidTimeout

Error Message

Deployment of the API proxy through either the Edge UI or Edge management API fails with this error message:

Error Saving Revision revision_number
CacheLookupTimeoutInSeconds value value should be greater than zero.

Example Error Message

Error Saving Revision 2
CacheLookupTimeoutInSeconds -1 value should be greater than zero.

Example Error Screenshot

Cause

If the <CacheLookupTimeoutInSeconds> element of a ResponseCache policy is set to a negative number, then the deployment of the API proxy fails.

For example, if the <CacheLookupTimeoutInSeconds> is -1, then the deployment of the API proxy fails.

Diagnosis

1. Identify the invalid value used for the <CacheLookupTimeoutInSeconds> element in the ResponseCache policy. You can find this information in the error message. For example, in the following error, the invalid value used for <CacheLookupTimeoutInSeconds> element is -1:

   CacheLookupTimeoutInSeconds -1 value should be greater than zero.
   

2. Examine all the ResponseCache policies in the specific API Proxy where the failure has occurred. There could be one or more ResponseCache policies in which the <CacheLookupTimeoutInSeconds> element is specified.

   For example, the following policy configuration sets <CacheLookupTimeoutInSeconds> to -1, which matches with what's in the error message:

   <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
   <ResponseCache async="false" continueOnError="false" enabled="true" name="Response-Cache-1">
       <DisplayName>Response Cache-1</DisplayName>
       <Properties/>
       <CacheKey>
           <Prefix/>
           <KeyFragment ref="request.uri" type="string"/>
       </CacheKey>
       <Scope>Exclusive</Scope>
       <ExpirySettings>
           <ExpiryDate/>
           <TimeOfDay/>
           <TimeoutInSec ref="">3600</TimeoutInSec>
       </ExpirySettings>
       <CacheLookupTimeoutInSeconds>-1</CacheLookupTimeoutInSeconds>
   </ResponseCache>
   

3. If the <CacheLookupTimeoutInSeconds> is specified as a negative integer, then that's the cause of the error.

Resolution

Ensure that the value for the <CacheLookupTimeoutInSeconds> element of the ResponseCache policy is always specified as a non-negative integer.

To correct the example ResponseCache policy shown above, you could modify the <CacheLookupTimeoutInSeconds> element to 30.

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ResponseCache async="false" continueOnError="false" enabled="true" name="Response-Cache-1">
    <DisplayName>Response Cache-1</DisplayName>
    <Properties/>
    <CacheKey>
        <Prefix/>
        <KeyFragment ref="request.uri" type="string"/>
    </CacheKey>
    <Scope>Exclusive</Scope>
    <ExpirySettings>
        <ExpiryDate/>
        <TimeOfDay/>
        <TimeoutInSec ref="">3600</TimeoutInSec>
    </ExpirySettings>
    <CacheLookupTimeoutInSeconds>30</CacheLookupTimeoutInSeconds>
</ResponseCache>

InvalidCacheResourceReference

Error Message

Deployment of the API proxy through either the Edge UI or Edge management API fails with this error message:

Error Deploying Revision revision_number to environment
Invalid cache resource reference cache_resource in Step definition response_cache_policy_name. Context Revision:revision_number;APIProxy:ResponseCache;Organization:organization;Environment:environment

Example Error Message

Error Deploying Revision 2 to prod
Invalid cache resource reference itemscache in Step definition ItemsResponseCache. Context Revision:2;APIProxy:StoresInventory;Organization:kkalckstein-eval;Environment:prod

Example Error Screenshot

Cause

This error occurs if the <CacheResource> element in a ResponseCache policy is set to a name that does not exist in the environment where the API proxy is being deployed.

Diagnosis

1. Identify the invalid cache used in <CacheResource> element of the Response Cache policy and the environment where the error occurred. You can find both of these items in the error message. For example, in the following error, the name of the invalid cache is itemscache and the environment name is prod.

   Invalid cache resource reference itemscache in Step definition ItemsResponseCache. Context Revision:2;APIProxy:StoresInventory;Organization:kkalckstein-eval;Environment:prod
   

2. Examine all the ResponseCache policies in the specific API Proxy where the failure has occurred. Identify the specific ResponseCache policy where the invalid cache (identified in step #1) is specified in <CacheResource> element.

   For example, the following policy specifies the value of <CacheResource> as itemscache, which matches with what’s in the error message:

   <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
   <ResponseCache async="false" continueOnError="false" enabled="true" name="ItemsResponseCache">
     <DisplayName>ItemsResponseCache</DisplayName>
     <Properties/>
     <CacheKey>
         <Prefix/>
         <KeyFragment ref="request.uri" type="string"/>
     </CacheKey>
     <CacheResource>itemscache</CacheResource>
     <Scope>Exclusive</Scope>
     <ExpirySettings>
         <ExpiryDate/>
         <TimeOfDay/>
         <TimeoutInSec ref="">3600</TimeoutInSec>
     </ExpirySettings>
     <SkipCacheLookup/>
     <SkipCachePopulation/>
   </ResponseCache>
   

3. Verify if the cache (determined in step #2) has been defined in the specific environment (identified in step #1).

   In the Edge UI, navigate to APIs > Environment Configuration and check if the cache exists in the Caches tab in the specific environment. If the cache does not exist, then that's the cause of the error.

   For example, notice in the screenshot below that the cache named itemscache does not exist.

   

   Because the cache named itemscache is not defined in the prod environment, you get the error:

   Invalid cache resource reference does_not_exist in Step definition Response-Cache-1. Context Revision:2;APIProxy:ResponseCache;Organization:kkalckstein-eval;Environment:prod
   

Resolution

Ensure that the cache name specified in the <CacheResource> element has been created in the environment where you want to deploy the API proxy.

Refer to Creating and editing an environment cache for information on how to create the cache.

ResponseCacheStepAttachmentNotAllowedReq

Error Message

Deployment of the API proxy through either the Edge UI or Edge management API fails with this error message:

Error Deploying Revision revision_number to environment
Response cache step definition response_cache_policy_name can not be attached more than once in the request path.

Example Error Message

Error Deploying Revision 2 to test
Response cache step definition Response-Cache-1 can not be attached more than once in the request path.

Example Error Screenshot

Cause

This error occurs if the same ResponseCache policy is attached to multiple request paths within any flows of an API proxy.

For example, if you have the same ResponseCache policy attached in the request Preflow of both the Proxy and Target Endpoints, then this error occurs.

Diagnosis

1. Identify the name of the ResponseCache policy that is attached more than once. You can find this information in the error message. For example, in the following error the name of the ResponseCache policy is Response‑Cache‑1.

   Error Deploying Revision 2 to test
   Response cache step definition Response-Cache-1 can not be attached more than once in the request path.
   

2. Examine all the request flows in the Proxy and Target Endpoints of the API Proxy where the error occurred. If the same ResponseCache policy is attached in two or more request flows, then that's the cause of the error.

   In the following example the same ResponseCache policy Response-Cache-1 is configured in the request path of the default proxy endpoint PreFlow, and the default target endpoint PreFlow:

   <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
   <ProxyEndpoint name="default">
       <Description/>
       <FaultRules/>
       <PreFlow name="PreFlow">
           <Request>
               <Step>
                   <Name>Response-Cache-1</Name>
               </Step>
           </Request>
       ...
   <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
   <TargetEndpoint name="default">
       <Description/>
       <FaultRules/>
       <PreFlow name="PreFlow">
           <Request/>
           <Response/>
       </PreFlow>
       <PostFlow name="PostFlow">
           <Request>
               <Step>
                   <Name>Response-Cache-1</Name>
               </Step>
           </Request>
       ...
   

Resolution

Ensure a ResponseCache policy is attached to only one request path across all flows of the API Proxy.

To correct the example shown above, remove the ResponseCache policy Response-Cache-1 from one of the two request flows.

ResponseCacheStepAttachmentNotAllowedResp

Error Message

Deployment of the API proxy through either the Edge UI or Edge management API fails with this error message:

Error Deploying Revision revision_number to environment
Response cache step definition response_cache_policy_name can not be attached more than once in the response path.

Example Error Message

Error Deploying Revision 2 to test
Response cache step definition Response-Cache-1 can not be attached more than once in the response path.

Example Error Screenshot

Cause

This error occurs if the same ResponseCache policy is attached to multiple response paths within any flows of an API proxy.

For example, if you have the same ResponseCache policy attached in the response Preflow of both the Proxy and Target Endpoints, then this error occurs.

Diagnosis

1. Identify the name of the ResponseCache policy that is attached more than once. You can find this information in the error message. For example, in the following error the name of the ResponseCache policy is Response-Cache-1.

   Error Deploying Revision 2 to test
   Response cache step definition Response-Cache-1 can not be attached more than once in the response path.
   

2. Examine all the request flows in the Proxy and Target Endpoints of the API Proxy where the error occurred. If the same ResponseCache policy is attached in two or more response flows, then that's the cause of the error.

   In the following example the same ResponseCache policy Response-Cache-1 is configured in the response path of the default proxy endpoint PreFlow, and the default target endpoint PreFlow:

   <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
   <ProxyEndpoint name="default">
       <Description/>
       <FaultRules/>
       <PreFlow name="PreFlow">
           <Request>
               <Step>
                   <Name>Response-Cache</Name>
               </Step>
           </Request>
           <Response>
               <Step>
                   <Name>Response-Cache-1</Name>
               </Step>
           </Response>
       </PreFlow>
       ...
   <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
   <TargetEndpoint name="default">
       <Description/>
       <FaultRules/>
       <PreFlow name="PreFlow">
           <Request/>
           <Response/>
       </PreFlow>
       <PostFlow name="PostFlow">
           <Request/>
           <Response>
               <Step>
                   <Name>Response-Cache-1</Name>
               </Step>
           </Response>
       </PostFlow>
       ...
   

Resolution

Ensure a ResponseCache policy is attached to only one response path across all flows of the API Proxy.

To correct the example shown above, remove the ResponseCache policy Response-Cache-1 from one of the two response paths.

InvalidMessagePatternForErrorCode

Error Message

Deployment of the API proxy through either the Edge UI or Edge management API fails with either of these error messages:

Error Deploying Revision revision_number to environment
Invalid message pattern found for error code steps.cache.InvalidSkipCacheLookUpCondition.

OR

Error Deploying Revision revision_number to environment
Invalid message pattern found for error code steps.cache.InvalidSkipCachePopulationCondition.

Example Error Message

Error Deploying Revision 2 to prod
Invalid message pattern found for error code steps.cache.InvalidSkipCacheLookUpCondition.

OR

Error Deploying Revision 2 to prod
Invalid message pattern found for error code steps.cache.InvalidSkipCachePopulationCondition.

Example Error Screenshot

OR

Cause

This error occurs if either the <SkipCacheLookup> or <SkipCachePopulation> element in a ResponseCache policy contains an invalid condition.

Diagnosis

1. Examine all the ResponseCache policies in the API Proxy where the error occurred and check if there are any policies that have conditions specified for <SkipCacheLookup> and/or the <SkipCachePopulation> elements.

2. Check if the condition specified for the <SkipCacheLookup> and/or the <SkipCachePopulation> element is invalid. If yes, then that's the cause of the error.

   In the following example, the <SkipCachePopulation>element uses the JavaScript operator === to check for equal value and equal type which is invalid.

   <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
   <ResponseCache async="false" continueOnError="false" enabled="true" name="Response-Cache-1">
       <DisplayName>Response Cache-1</DisplayName>
       <Properties/>
       <CacheKey>
           <Prefix/>
           <KeyFragment ref="request.uri" type="string"/>
       </CacheKey>
       <Scope>Exclusive</Scope>
       <ExpirySettings>
           <ExpiryDate/>
           <TimeOfDay/>
           <TimeoutInSec ref="">3600</TimeoutInSec>
       </ExpirySettings>
       <CacheLookupTimeoutInSeconds>2</CacheLookupTimeoutInSeconds>
       <SkipCacheLookup>request.header.bypass-cache === "true"</SkipCacheLookup>
   </ResponseCache>
   

   Because the operator === is invalid, you get the error:

   Invalid message pattern found for error code steps.cache.InvalidSkipCacheLookUpCondition.
   

Resolution

Ensure the condition specified for the <SkipCacheLookup> and/or <SkipCachePopulation> elements is always valid.

To correct the example ResponseCache policy shown above, you could modify the <SkipCacheLookup> to use the = operator:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ResponseCache async="false" continueOnError="false" enabled="true" name="Response-Cache-1">
    <DisplayName>Response Cache-1</DisplayName>
    <Properties/>
    <CacheKey>
        <Prefix/>
        <KeyFragment ref="request.uri" type="string"/>
    </CacheKey>
    <Scope>Exclusive</Scope>
    <ExpirySettings>
        <ExpiryDate/>
        <TimeOfDay/>
        <TimeoutInSec ref="">3600</TimeoutInSec>
    </ExpirySettings>
    <CacheLookupTimeoutInSeconds>2</CacheLookupTimeoutInSeconds>
    <SkipCacheLookup>request.header.bypass-cache = "true"</SkipCacheLookup>
</ResponseCache>

CacheNotFound

Error Message

Deployment of the API proxy through either the Edge UI or Edge management API results in an error message like this, and the deployment status of the API Proxy is marked as partially deployed:

Error: Cache : cache_resource, not found in organization : organization__environment.

Example Error Message

Error Cache : Response-Cache-1, not found in organization : kkalckstein-eval__prod

Cause

This error occurs if the specific cache mentioned in the error message has not been created on a specific Message Processor component.

Resolution

If you are a Private Cloud user, follow the instructions below:

1. List the API proxy deployments and determine which Message Processors have the error steps.cache.CacheNotFound.

   Sample Output

   curl -u $USERID:$USERPASSWORD http://<management-server-host>:8080/v1/organizations/<org-name>/environments/<env-name>/apis/<apiproxy-name>/revisions/<revision-number>/deployments
   {
     "aPIProxy" : "ResponseCache",
     "environment" : [ {
       "configuration" : {
         "basePath" : "/",
         "configVersion" : "SHA-512:45d3f39783414d3859bf2dec4135d8f5f9960ee6b2d361db2799c82693a8e3f8b95dbbb37c547eb3c0a3819d8ca51727f390502bcaefdf1f113263521a9023b6",
         "steps" : [ ]
       },
       "name" : "prod",
       "server" : [ {
         "pod" : {
           "name" : "pod1",
           "region" : "us-central1"
         },
         "status" : "deployed",
         "type" : [ "message-processor" ],
         "uUID" : "f2e5e34a-5630-43a9-8fef-48a5b9da76d1"
       }, {
         "pod" : {
           "name" : "pod1",
           "region" : "us-central1"
         },
         "status" : "deployed",
         "type" : [ "message-processor" ],
         "uUID" : "879a6538-a5e0-4503-b142-9cb2b4e0623d"
       }, {
       "error" : "Cache : Response-Cache-1, not found in organization : kkalckstein-eval__prod",
       "errorCode" : "steps.cache.CacheNotFound",
       "status" : "error",
       "type" : [ "message-processor" ],
        "uUID" : "a8f9ce0b-c32d-48a9-b26c-9c75d8bf467d"
   },
   ...
       "state" : "deployed"
     } ],
     "name" : "2",
     "organization" : "kkalckstein-eval"
   

2. Note the UUID(s) of the Message Processor in which you observe the error steps.cache.CacheNotFound. Identify the host name/IP address of the Message Processor from the UUID.

3. Log in to the specific Message Processor and restart it using the following command:

   apigee-service edge-message-processor restart

If you are a Public Cloud user or if the issue persists for Private Cloud, contact Apigee Support for assistance.