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https://issues.apache.org/jira/browse/CAMEL-5761?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Willem Jiang reassigned CAMEL-5761:
-----------------------------------
Assignee: Willem Jiang
> Update SqsConsumer to extend Visibility Timeout correctly
> ---------------------------------------------------------
>
> Key: CAMEL-5761
> URL: https://issues.apache.org/jira/browse/CAMEL-5761
> Project: Camel
> Issue Type: Bug
> Components: camel-aws
> Affects Versions: 2.10.2
> Reporter: Carlos Roman
> Assignee: Willem Jiang
> Labels: aws, patch, sqs
> Attachments: aws_sqs_visibility_timeout_phased_timeout.patch,
> aws_sqs_visibility_timeout_simple.patch
>
>
> Currently SqsConsumer will scheduled a future to happen start occruing 1/2
> the visibility timeout, and reoccur again at the visibility timeout period.
> Because of the way SQS works, when you request a ChangeMessageVisibility
> timeout it does not add that to the time remaining on the message visibility.
> Instead it will set the message visibility to the time out given. This means
> that what actually happens in the camel code is that:
> * we request the ChangeMessageVisibility timeout to be set to X seconds from
> now after X/2 seconds
> * then every X seconds after that we we request the ChangeMessageVisibility
> timeout to be set to X from now
> This means that our message will become visible every now and again as the
> ChangeMessageVisibility timeout is not updated in time as period between
> successive executions is the same as the timeout period we request.
> I've attached two patches which would fix this issue.
> * "aws_sqs_visibility_timeout_simple.patch" - This patch changes the way we
> set up the future. The delay and period are now the same so that we call
> ChangeMessageVisibility every X/2 after the message has been pulled.
> * "aws_sqs_visibility_timeout_phased_timeout.patch" - This one keeps the
> delay to 1/2 the period and requests ChangeMessageVisibility every period.
> This time though it requests the visibility to be 1.5 * the period. This
> means that it behaves as originally planned, as if it was adding duration to
> the visibility duration left. This means we call Amazon less times and still
> keep the message hidden as expected.
> This was looked at with Alex Hutter (both working on same project).
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