Summary of latest 60(to 28/6/2026) CI failures.

[gaganis]

Version

5.x 5.x-stable

Context

I had trouble getting a green CI build of my https proxy PR #6215. In my effort to determine whether the failures I was seeing were due to my changes I did an analysis of the past failures to see if these failure preexisted due to flaky tests.

I decided to publish the report in case it is useful and to serve as a meta ticket to tackle these flaky test failures. I also added a column to link related PRs or issues. I have posted a PR with a suggested fix for NetTest.testListenDomainSocketAddress[Native] #6217

Frequency	Test	Error	Related issues / PRs
9/60 (15%)	NetTest.testEndHandlerCalledAfterAllEmissions	IllegalState "Timed out"	#6219
7/60 (11.7%)	Http2 *HeadersPutAll / testResponseTrailers*	Illegal 'TE' header value / Stream reset
4/60 (6.7%)	Http2*.testSslHandshakeTimeout	Timeout Unsatisfied checkpoint
4/60 (6.7%)	NetTest.testListenDomainSocketAddress[Native]	leftover .sock / native timeout	#6217
3/60 (5%)	it.networklogging.NetTest.testServerLogging / testNoLogging	Timeout (120 s)
2/60 (3.3%)	WebSocketTest.* (4 methods across 2 runs)	Timeout Unsatisfied checkpoint
2/60 (3.3%)	Http1xProxyTest.testNonProxyHosts3	Bind "Address already in use"
2/60 (3.3%)	Http1xSendFileTest.testSendOpenRangeFileFromClasspath
2/60 (3.3%)	MetricsTest.testThreadPoolMetrics* (windows)
2/60 (3.3%)	NetTest.testServerWithIdleTimeoutSendChunkedFile
1/60 (1.7%)	NetBandwidthLimitingTest.fileUploadIsThrottled	Timeout (120 s)
1/60 (1.7%)	DNSTest.* (windows)	Bind "Address already in use"
1/60 (1.7%)	SynchronizationTest.* (4.x, windows)
1/60 (1.7%)	NetTest.testCloseUnwritableSocket
1/60 (1.7%)	HttpsProxyTest.testHttpsProxy_Http2Origin_tunnelled
1/60 (1.7%)	SharedHttpClientTest.testSharedPoolRetainedByOtherDeployment
1/60 (1.7%)	Http3Test>HttpTest.testResponseTrailers
1/60 (1.7%)	Http2MetricsTest…testHttpClientMetricsQueueClose
1/60 (1.7%)	Http1xTest.testInvalidChunkInHttpServerRequest	Timeout Unsatisfied checkpoint
1/60 (1.7%)	SSLEngineTest.testWebSocketDefaultEngine	Timeout Unsatisfied checkpoint