Seeing Warning Logs :: Cannot refresh Redis Cluster topology in 6.2.6.RELEASE

[subrajitdhal]

Bug Report

Current Behavior

I've found that the WARN log message is "Cannot refresh Redis Cluster topology", after AWS Elasticache instance reboot.
Although the log was printed every topology refresh period, all requests was fine.NO connection issue though.it just print warning logs.

Unable to connect to [xxxxxxx:port]: PKIX path validation failed: java.security.cert.CertPathValidatorException: Unable to determine revocation status due to network error

Stack trace

i.l.c.c.t.DefaultClusterTopologyRefresh$CannotRetrieveClusterPartitions: Cannot retrieve cluster partitions from [rediss://********************@xxxxxx:port]

Details:
	[rediss://********************@xxxxx:port]: PKIX path validation failed: java.security.cert.CertPathValidatorException: Unable to determine revocation status due to network error

	Suppressed: java.io.EOFException: not enough content
		at sun.security.util.DerValue.<init>(DerValue.java:425)
		at sun.security.util.DerValue.<init>(DerValue.java:340)
		at s.s.provider.certpath.OCSPResponse.<init>(OCSPResponse.java:200)
		at sun.security.provider.certpath.OCSP.check(OCSP.java:196)
		at s.s.provider.certpath.RevocationChecker.checkOCSP(RevocationChecker.java:785)
		at s.s.provider.certpath.RevocationChecker.check(RevocationChecker.java:369)

Input Code

Input Code

  private val topologyRefreshOptions: ClusterTopologyRefreshOptions = ClusterTopologyRefreshOptions
    .builder()
    .enablePeriodicRefresh(RedisClusterTopologyRefreshInterval)
    .enableAllAdaptiveRefreshTriggers()
    .dynamicRefreshSources(true)
    .build()

Expected behavior/code

"Cannot refresh Redis Cluster topology" log should no longer be printed.

Environment

• Lettuce version(s): 6.2.6.RELEASE

Possible Solution

Additional context

[tishun]

Hey @subrajitdhal ,

How do you verify that "all requests are fine. NO connection issue though."?

From the code I see in Lettuce the WARN message you are seeing is indicating that the topology refresh has failed.
The indicated issue is that the revocation status of the certificate could not be established due to network error.

Have in mind that a topology refresh failing would not stop the driver from operating and using the topology it already has from previous attempts, but the topology information would not be updated until the network issue is resolved.