Issue with stock update on amazon with mws - amazon-mws

Question

We are using the following details for updating the quantity of a product in amazon. Wile using scratch pad, option Feeds->SubmitFeed
Set the required parameters and pass the following XML
<?xml version="1.0" encoding="utf-8" ?>
<AmazonEnvelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="amzn-envelope.xsd">
<Header>
<DocumentVersion>1.01</DocumentVersion>
<MerchantIdentifier>$merchantID</MerchantIdentifier>
</Header>
<MessageType>Inventory</MessageType>
<Message>
<MessageID>1</MessageID>
<OperationType>Update</OperationType>
<Inventory>
<SKU>$SKU</SKU>
<Quantity>8</Quantity>
</Inventory>
</Message>
</AmazonEnvelope>
feed type : _POST_INVENTORY_AVAILABILITY_DATA_
we are getting in response for the same - submissionid. I know it takes sometime to update. But i waited and waited .. 4 atleast 15 hrs (not minutes) but it still was in process and the quantity was never updated.
Am getting in the following response
<?xml version="1.0"?>
<SubmitFeedResponse xmlns="http://mws.amazonaws.com/doc/2009-01-01/">
<SubmitFeedResult>
<FeedSubmissionInfo>
<FeedSubmissionId>6791310806</FeedSubmissionId>
<FeedType>_POST_INVENTORY_AVAILABILITY_DATA_</FeedType>
<SubmittedDate>2013-03-21T19:48:37+00:00</SubmittedDate>
<FeedProcessingStatus>_SUBMITTED_</FeedProcessingStatus>
</FeedSubmissionInfo>
</SubmitFeedResult>
<ResponseMetadata>
<RequestId>fd07bf18-4f6a-4786-bdf9-9d4db50956d0</RequestId>
</ResponseMetadata>
</SubmitFeedResponse>
and getting in following response on checking the status of the feed
<?xml version="1.0"?>
<ErrorResponse xmlns="http://mws.amazonaws.com/doc/2009-01-01/">
<Error>
<Type>Sender</Type>
<Code>FeedProcessingResultNotReady</Code>
<Message>Feed Submission Result is not ready for Feed Submission Id: 6791310806</Message>
<Detail/>
</Error>
<RequestID>2c86128d-b53a-4fc3-80d1-6b41b53a8977</RequestID>
</ErrorResponse>
Can any1 guide me.. where did i go wrong .. in here? or if there is any better way to look on for the same.

Answer 1

The time it seems to be taking isn't normal. Submitted feeds usually switch to _IN_PROGRESS_ within a few minutes and then take another few minutes to complete, when the status switches to _DONE_. Short feeds like your example feed should take less than a minute to process.
In the past, I've seen one feed upload blocking another though. It seems that sometimes the MWS won't start processing one feed until a previous feed of the same user has gone trough (or for that matter: failed). Please check if you have other request that might block yours (GetFeedSubmissionList)
Apart from this, the answers you are getting from Amazon MWS are perfectly normal. Your feed was accepted and put into the processing queue. The queue status was set to _SUBMITTED_, and as long as it hasn't switched to DONE, you will get the FeedProcessingResultNotReady answer you were seeing.