[fix][client] Fix authentication not update after changing the serviceUrl

[hangc0276]

Motivation

When we use cluster level failover and enabled authentication, we found the authentication couldn't update in the HttpLookupService. The root cause is that the HttpLookupService cached the httpClient, but the updateServiceUrl only updates the target serviceUrl for the httpClient, without any updates for authentication.

pulsar/pulsar-client/src/main/java/org/apache/pulsar/client/impl/HttpLookupService.java

Lines 65 to 75 in 70c4003

	public HttpLookupService(ClientConfigurationData conf, EventLoopGroup eventLoopGroup)
	throws PulsarClientException {
	this.httpClient = new HttpClient(conf, eventLoopGroup);
	this.useTls = conf.isUseTls();
	this.listenerName = conf.getListenerName();
	}
	@Override
	public void updateServiceUrl(String serviceUrl) throws PulsarClientException {
	httpClient.setServiceUrl(serviceUrl);
	}

Modifications

Call pulsarClient.reloadLookUp() to update the authentication manually when the target cluster is switched.

Verifying this change

• Make sure that the change passes the CI checks.

(Please pick either of the following options)

This change is a trivial rework / code cleanup without any test coverage.

(or)

This change is already covered by existing tests, such as (please describe tests).

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This change added tests and can be verified as follows:

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• Added integration tests for end-to-end deployment with large payloads (10MB)
• Extended integration test for recovery after broker failure

Does this pull request potentially affect one of the following parts:

If the box was checked, please highlight the changes

• Dependencies (add or upgrade a dependency)
• The public API
• The schema
• The default values of configurations
• The threading model
• The binary protocol
• The REST endpoints
• The admin CLI options
• The metrics
• Anything that affects deployment

Documentation

• doc
• doc-required
• doc-not-needed
• doc-complete

Matching PR in forked repository

PR in forked repository: hangc0276#10

[codelipenghui]

/pulsarbot run-failure-checks

[momo-jun]

Hi @hangc0276, did you have any plans to update the docs for this fix? Just want to make sure it can catch up with the release schedule.

[hangc0276]

Hi @hangc0276, did you have any plans to update the docs for this fix? Just want to make sure it can catch up with the release schedule.

@momo-jun sorry, I add the wrong doc tag. This Pr doesn't need any doc updates.