CODEWITHSUNDEEP
javagoogle-app-enginetask-queue
katratxo
katratxo

Reputation: 41

404 Instance Unavailable when running a Task Queue

I'm using Java SDK 1.7.5, HRD datastore with the following task queue setup:

<queue>
  <name>surveyAssembly</name>
  <rate>5/s</rate>
  <bucket-size>20</bucket-size>
  <max-concurrent-requests>10</max-concurrent-requests>
</queue>

GAE console

I'm getting a HTTP 404 when triggering the task. No errors in the logs just failing silently.

It seems a similar issue to this one Tasks queue up, nothing happens on retry (no log) but no luck after purging the queue.

Any ideas on how to diagnose the cause?

Upvotes: 1

Views: 668

Answers (1)

Ashish
Ashish

Reputation: 250

I was also getting same error. After debug I found that I forget to deploy back-end version from eclipse. So You have to confirm that both backend and frontend has same updated code.

Try this code //backends.xml

<backends>
 <backend name="mailback">
 </backend>
</backends>

// Queue code

Queue surveyAssemblyQueue = QueueFactory.getQueue("surveyAssembly");
surveyAssemblyQueue.add(withUrl("/taskloop")param("type", type).header("Host",BackendServiceFactory.getBackendService().getBackendAddress("mailback", 0)));

Note: Instant Id should be "0" because I have created only 1 backend instant.

Upvotes: 1

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