4.21.0-0.okd-scos-2026-04-02-021324

Download installer and client with:

oc adm release extract --tools registry.ci.openshift.org/origin/release-scos:4.21.0-0.okd-scos-2026-04-02-021324

Team Approvals:

Tests:

Blocking jobs
- aws Succeeded (1 retry) periodic-ci-openshift-release-main-okd-scos-4.21-e2e-aws-ovn
  - Attempt 1 Failed
  - Attempt 2 Succeeded
Informing jobs
- aws-upgrade Pending (1 retry) periodic-ci-openshift-release-main-okd-scos-4.21-e2e-aws-ovn-upgrade
  - Attempt 1 Failed
  - Attempt 2 Pending
- aws-upgrade-minor Succeeded periodic-ci-openshift-release-main-okd-scos-4.21-upgrade-from-okd-scos-4.20-e2e-aws-ovn-upgrade

Upgrades from:

Unable to show full changelog: could not get image info for from pullSpec registry.ci.openshift.org/origin/release-scos:4.21.0-0.okd-scos-2026-04-02-021324: could not get image info for registry.ci.openshift.org/origin/release-scos:4.21.0-0.okd-scos-2026-04-02-021324: runtime/cgo: pthread_create failed: Resource temporarily unavailable SIGABRT: abort PC=0x7fb0f59ed02c m=0 sigcode=18446744073709551610 goroutine 0 gp=0x860a420 m=0 mp=0x860c6a0 [idle]: runtime: g 0 gp=0x860a420: unknown pc 0x7fb0f59ed02c stack: frame={sp:0x7ffc79f523a0, fp:0x0} stack=[0x7ffc79760000,0x7ffc79f52900) 0x00007ffc79f522a0: 0x0000000001cacf33 0x00007ffc79f522d0 0x00007ffc79f522b0: 0x00007ffc79f522e0 0x000000000003b2ea 0x00007ffc79f522c0: 0x000000000852f200 0x0000000000021301 0x00007ffc79f522d0: 0x0000000000000000 0x00007ffc79f52398 0x00007ffc79f522e0: 0x0000000001c7576d 0x00007fb0f587dc00 0x00007ffc79f522f0: 0x00007ffc79f52328 0x0000000001ca7549 0x00007ffc79f52300: 0x00007ffc79f52378 0x0000000001cad2f2 0x00007ffc79f52310: 0x0006cc0036600000 0x0007f8003fc00000 0x00007ffc79f52320: 0x0000000000000000 0x0000000000000012 0x00007ffc79f52330: 0x0000000000000003 0x0000000000000000 0x00007ffc79f52340: 0x0000000000002030 0x0000000000002031 0x00007ffc79f52350: 0x0000000000000003 0x0000000000000000 0x00007ffc79f52360: 0x00007fb0f59e8b50 0x000000001c000004 0x00007ffc79f52370: 0x00007fb0f599fc30 0x00007fb0f59fa689 0x00007ffc79f52380: 0x0000000000000000 0x0000000000000011 0x00007ffc79f52390: 0x0000000000000130 0x00007fb0f59ed01e 0x00007ffc79f523a0: <0x0000000000000120 0x00007ffc79f525b8 0x00007ffc79f523b0: 0x00007ffc00000013 0x00007ffc79f525c8 0x00007ffc79f523c0: 0x00007ffc79f525f8 0x0000000000000004 0x00007ffc79f523d0: 0x0000003400000013 0x00007fb0f5a70421 0x00007ffc79f523e0: 0x00007fb0aed2a640 0x00007ffc79f526b0 0x00007ffc79f523f0: 0x00007ffc79f5251e 0x00007ffc79f5251f 0x00007ffc79f52400: 0x00007fb0aed2a640 0x00007fb0f59eaed5 0x00007ffc79f52410: 0x00007fb0f5b5aca0 0x0000000000000120 0x00007ffc79f52420: 0x00000000003d0f00 0x8e19422cb9ecce00 0x00007ffc79f52430: 0x00007fb0f595d740 0x0000000000000006 0x00007ffc79f52440: 0x00000000099b22a0 0x00007ffc79f52770 0x00007ffc79f52450: 0x000000000860a420 0x00007fb0f599fb86 0x00007ffc79f52460: 0x00007fb0f5b5beb0 0x00007fb0f5989873 0x00007ffc79f52470: 0x0000000000000020 0x8e19422cb9ecce00 0x00007ffc79f52480: 0x00007fb0ae52a000 0x00007fb0aed2a640 0x00007ffc79f52490: 0x0000000000000000 0x00007fb0f59e2fbd runtime: g 0 gp=0x860a420: unknown pc 0x7fb0f59ed02c stack: frame={sp:0x7ffc79f523a0, fp:0x0} stack=[0x7ffc79760000,0x7ffc79f52900) 0x00007ffc79f522a0: 0x0000000001cacf33 0x00007ffc79f522d0 0x00007ffc79f522b0: 0x00007ffc79f522e0 0x000000000003b2ea 0x00007ffc79f522c0: 0x000000000852f200 0x0000000000021301 0x00007ffc79f522d0: 0x0000000000000000 0x00007ffc79f52398 0x00007ffc79f522e0: 0x0000000001c7576d 0x00007fb0f587dc00 0x00007ffc79f522f0: 0x00007ffc79f52328 0x0000000001ca7549 0x00007ffc79f52300: 0x00007ffc79f52378 0x0000000001cad2f2 0x00007ffc79f52310: 0x0006cc0036600000 0x0007f8003fc00000 0x00007ffc79f52320: 0x0000000000000000 0x0000000000000012 0x00007ffc79f52330: 0x0000000000000003 0x0000000000000000 0x00007ffc79f52340: 0x0000000000002030 0x0000000000002031 0x00007ffc79f52350: 0x0000000000000003 0x0000000000000000 0x00007ffc79f52360: 0x00007fb0f59e8b50 0x000000001c000004 0x00007ffc79f52370: 0x00007fb0f599fc30 0x00007fb0f59fa689 0x00007ffc79f52380: 0x0000000000000000 0x0000000000000011 0x00007ffc79f52390: 0x0000000000000130 0x00007fb0f59ed01e 0x00007ffc79f523a0: <0x0000000000000120 0x00007ffc79f525b8 0x00007ffc79f523b0: 0x00007ffc00000013 0x00007ffc79f525c8 0x00007ffc79f523c0: 0x00007ffc79f525f8 0x0000000000000004 0x00007ffc79f523d0: 0x0000003400000013 0x00007fb0f5a70421 0x00007ffc79f523e0: 0x00007fb0aed2a640 0x00007ffc79f526b0 0x00007ffc79f523f0: 0x00007ffc79f5251e 0x00007ffc79f5251f 0x00007ffc79f52400: 0x00007fb0aed2a640 0x00007fb0f59eaed5 0x00007ffc79f52410: 0x00007fb0f5b5aca0 0x0000000000000120 0x00007ffc79f52420: 0x00000000003d0f00 0x8e19422cb9ecce00 0x00007ffc79f52430: 0x00007fb0f595d740 0x0000000000000006 0x00007ffc79f52440: 0x00000000099b22a0 0x00007ffc79f52770 0x00007ffc79f52450: 0x000000000860a420 0x00007fb0f599fb86 0x00007ffc79f52460: 0x00007fb0f5b5beb0 0x00007fb0f5989873 0x00007ffc79f52470: 0x0000000000000020 0x8e19422cb9ecce00 0x00007ffc79f52480: 0x00007fb0ae52a000 0x00007fb0aed2a640 0x00007ffc79f52490: 0x0000000000000000 0x00007fb0f59e2fbd goroutine 1 gp=0xc000002380 m=0 mp=0x860c6a0 [running]: runtime.systemstack_switch() /usr/lib/golang/src/runtime/asm_amd64.s:478 +0x8 fp=0xc0000aa750 sp=0xc0000aa740 pc=0x1cc7488 runtime.main() /usr/lib/golang/src/runtime/proc.go:173 +0x67 fp=0xc0000aa7e0 sp=0xc0000aa750 pc=0x1c88247 runtime.goexit({}) /usr/lib/golang/src/runtime/asm_amd64.s:1693 +0x1 fp=0xc0000aa7e8 sp=0xc0000aa7e0 pc=0x1cc94a1 rax 0x0 rbx 0x7fb0f595d740 rcx 0x7fb0f59ed02c rdx 0x6 rdi 0x14d502 rsi 0x14d502 rbp 0x14d502 rsp 0x7ffc79f523a0 r8 0x7ffc79f52470 r9 0x7fb0f5b11d20 r10 0x8 r11 0x246 r12 0x6 r13 0x7ffc79f52770 r14 0x860a420 r15 0xffffffffffffffff rip 0x7fb0f59ed02c rflags 0x246 cs 0x33 fs 0x0 gs 0x0

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