Federico Mariani created CAMEL-26651:
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Summary: camel-git - the consumer ignores the scheduler and error
handler options: delay is always 500 ms
Key: CAMEL-26651
URL: https://issues.apache.org/jira/browse/CAMEL-26651
Project: Camel
Issue Type: Bug
Components: camel-git
Affects Versions: 4.14.9, 4.18.5, 4.10.0, 4.23.0, 4.22.2
Reporter: Federico Mariani
h3. Problem
Since CAMEL-19665 (first released in 4.10.0), {{GitEndpoint}} extends
{{ScheduledPollEndpoint}}, so the catalog and the documentation list the
scheduler options for the git consumer. But {{GitEndpoint.createConsumer}}
never calls {{configureConsumer(consumer)}}: it returns {{new
GitCommitConsumer/GitTagConsumer/GitBranchConsumer(this, processor)}} directly
({{components/camel-git/src/main/java/org/apache/camel/component/git/GitEndpoint.java}}
lines 158-168, main commit 7978db3d42dd).
As a result, nothing copies the endpoint options to the consumer:
* {{ScheduledPollEndpoint.doConfigureConsumer}} options: delay, initialDelay,
startScheduler, greedy, backoffErrorThreshold, backoffIdleThreshold,
backoffMultiplier, repeatCount, pollStrategy, runLoggingLevel,
scheduledExecutorService, sendEmptyMessageWhenIdle, timeUnit, useFixedDelay,
scheduler and schedulerProperties.
* {{DefaultEndpoint.configureConsumer}} options: bridgeErrorHandler and
exceptionHandler.
The URI accepts these options and they are ignored without any warning. The
consumer always polls with the {{ScheduledPollConsumer}} defaults: initialDelay
1000 ms and delay 500 ms.
The source is the same in camel-4.10.0, 4.14.9, 4.18.5, 4.22.2, 4.23.0 and
main: none of them calls {{configureConsumer}}. In 4.8.0 the endpoint was a
{{DefaultEndpoint}}, so bridgeErrorHandler and exceptionHandler were already
ignored there, but the scheduler options did not exist yet.
h3. How to reproduce
Measured on main with a JUnit test, against a JGit repository in a temporary
directory:
{code:java}
GitEndpoint ep = context.getEndpoint("git:" + dir
+
"?type=commit&branchName=master&delay=60000&initialDelay=5000&startScheduler=false",
GitEndpoint.class);
assertEquals(60000, ep.getDelay());
GitCommitConsumer consumer = (GitCommitConsumer) ep.createConsumer(e -> { });
assertEquals(500, consumer.getDelay()); // not 60000
assertEquals(1000, consumer.getInitialDelay()); // not 5000
assertTrue(consumer.isStartScheduler()); // not false
{code}
Output: {{endpoint delay=60000 initialDelay=5000 startScheduler=false, consumer
delay=500 initialDelay=1000 startScheduler=true}}.
In an earlier run of the same test, {{startScheduler=false}} was set only on
the URI. The scheduler still polled in the background, at the same time as the
test's own {{poll()}} calls: more commits were delivered than the repository
had.
For comparison, from the source: {{GitHub2Endpoint.createConsumer}} in
camel-github2 does call {{configureConsumer}}.
h3. Proposed change
* Call {{configureConsumer(consumer)}} in {{GitEndpoint.createConsumer}} before
returning, as the other {{ScheduledPollEndpoint}} components do.
* Add a test that sets delay, initialDelay, startScheduler and
bridgeErrorHandler, and checks them on the consumer.
* Raising the default delay of the git consumer would be a separate decision:
every idle poll walks the whole history of the branch. It was measured at 720
ms per idle poll for 32k commits, growing about 3.4 times for each doubling of
the commit count.
h3. Impact / upgrade
* No default value changes. Routes that set these options get what they
configured: for example, {{delay=60000}} now really polls once a minute, and
{{bridgeErrorHandler=true}} now applies.
* That behaviour change is visible to existing routes, so a short note in the
4.24 upgrade guide is worthwhile.
* It affects all three consumer types (commit, tag and branch). The producer is
not affected.
h3. Related
* See also the other git consumer issue filed alongside: failed exchanges are
marked consumed and never delivered again. Its fix relies on the exception
handler and on a delay that can be raised.
* CAMEL-19665 (commits 51f270663f86 and 83ab5f1536c5) changed {{GitEndpoint}}
from {{DefaultEndpoint}} to {{ScheduledPollEndpoint}} without adding the call.
* Similar bugs, already fixed: CAMEL-22558 (the camel-jira consumer ignored the
delay option) and CAMEL-24357 (the camel-aws2-s3-vectors consumer ignored the
delay option).
_Claude Code on behalf of Federico Mariani_
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