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fix: Use nondurable cursors for pulsar readers #324

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omegaphoenix
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@omegaphoenix omegaphoenix commented Aug 22, 2024

From the Apache Pulsar documentation:

Internally, the reader interface is implemented as a consumer using an exclusive, non-durable subscription to the topic with a randomly-allocated name.

By default we set subscriptions to use a durable cursor:
https://github.com/streamnative/pulsar-rs/blob/master/PulsarApi.proto#L352

We only run into this when durable is None which can also be avoided
if we use Pulsar::reader() which also sets durable to Some(false).

However, there are cases where users may overwrite the options before
calling into_reader().

@omegaphoenix omegaphoenix force-pushed the feature/non-durable-readers branch from 4f54cc0 to 2b91111 Compare August 22, 2024 23:33
By default we set subscriptions to use a durable cursor:
https://github.com/streamnative/pulsar-rs/blob/master/PulsarApi.proto#L352

We only run into this when durable is None which can also be avoided
if we use Pulsar::reader() which also sets durable to Some(false).

However, there are cases where users may overwrite the options before
calling `into_reader()`.
@omegaphoenix omegaphoenix force-pushed the feature/non-durable-readers branch from 2b91111 to 79aee8c Compare August 22, 2024 23:47
@omegaphoenix
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Screenshot 2024-08-22 at 4 57 52 PM
An example of how we could shoot ourselves in the foot without this change

@BewareMyPower BewareMyPower merged commit a4012e8 into streamnative:master Aug 23, 2024
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@omegaphoenix omegaphoenix deleted the feature/non-durable-readers branch August 23, 2024 04:21
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2 participants