Traceback from logs:
Traceback (most recent call last):\n  File \"//cros/signer/signing_poller.py\", line 897, in DiscoverAndSignArtifacts\n    work_dir, insn_cfg, metadata)\n  File \"//cros/signer/signing_poller.py\", line 672, in SignLocalArtifact\n    output_names)\n  File \"//cros/signer/signing_poller.py\", line 522, in SignImage\n    self.signer_if.SignImage(input_image, itype, keyset, output)\n  File \"/cros/signer/image_signer.py\", line 458, in SignImage\n    self.ExecVbootScript(signing_cmd, extra_env=extra_env)\n  File \"/cros/signer/image_signer.py\", line 402, in ExecVbootScript\n    **kwargs)\n  File \"/cros/signer/image_signer.py\", line 372, in ExecCrosScript\n    return cros_build_lib.RunCommand(cmd, **kwargs)\n  File \"/cros/signer/lib/chromite_init.py\", line 35, in RunCommand\n    return OrigRunCommand(cmd, **kwds)\n  File \"/cros/signer/chromite/lib/cros_build_lib.py\", line 624, in RunCommand\n    raise RunCommandError(msg, cmd_result)\nRunCommandError: return code: 1; command: /cros/vboot_reference/scripts/image_signing/sign_official_build.sh recovery /tmp/signer.ykps4q/recovery_image.bin /tmp/signer.keydir.9G_fuk/cros/keys/RelmMPKeys-v7 /tmp/signer.ykps4q/chromeos_8992.0.0_relm_recovery_canary-channel_mp-v7.bin /tmp/signer.keydir.9G_fuk/cros/keys/RelmMPKeys-v7/key.versions\n\u001b[1;32mINFO   : Unpacking squashfs image to /tmp/tmp.Ktb14kJYDw/opt/google/containers/android/system.raw.img\u001b[0m\n\u001b[1;32mINFO   : Start signing framework apks\u001b[0m\n\u001b[1;32mINFO   : Re-signing (platform) /tmp/tmp.FMvijwcuKu/mnt/system/framework/framework-res.apk\u001b[0m\njava.io.FileNotFoundException: /tmp/signer.keydir.9G_fuk/cros/keys/RelmMPKeys-v7/android/platform.x509.pem (No such file or directory)\n\tat java.io.FileInputStream.open0(Native Method)\n\tat java.io.FileInputStream.open(FileInputStream.java:195)\n\tat java.io.FileInputStream.<init>(FileInputStream.java:138)\n\tat com.android.signapk.SignApk.readPublicKey(SignApk.java:160)\n\tat com.android.signapk.SignApk.main(SignApk.java:897)\n\nUsing firmware version: 1\nUsing kernel version: 1\nPreparing recovery image...\nExtracting to: /tmp/tmp.C5yZ7L3Vp5\nFound a valid firmware update shellball.\n### Processing LOEM 1 CTL\nNo dev firmware keyblock/datakey found. Reusing normal keys.\n - import root_key from /tmp/signer.keydir.9G_fuk/cros/keys/RelmMPKeys-v7/root_key.loem1.vbpubk: success\n - import recovery_key from /tmp/signer.keydir.9G_fuk/cros/keys/RelmMPKeys-v7/recovery_key.vbpubk: success\nsuccessfully saved new image to: /tmp/tmp.C5yZ7L3Vp5/bios.bin\n\n### Processing LOEM 2 JPSACOUTO\nNo dev firmware keyblock/datakey found. Reusing normal keys.\n\n### Processing LOEM 3 EDXIS\nNo dev firmware keyblock/datakey found. Reusing normal keys.\n\n### Processing LOEM 4 CDI\nNo dev firmware keyblock/datakey found. Reusing normal keys.\n\n### Processing LOEM 5 MUSTEK\nNo dev firmware keyblock/datakey found. Reusing normal keys.\n\n### Processing LOEM 6 DASANI\nNo dev firmware keyblock/datakey found. Reusing normal keys.\n\n### Processing LOEM 7 ACERTIFA\nNo dev firmware keyblock/datakey found. Reusing normal keys.\n\nSigned firmware image output to /tmp/tmp.C5yZ7L3Vp5/bios.bin\nRepacking from: /tmp/tmp.C5yZ7L3Vp5\nChanged TARGET_FWID to Google_Relm.7287.283.0\nChanged TARGET_ECID to relm_v1.1.3683-945cd3c\nRe-signed firmware AU payload in /tmp/signer.ykps4q/chromeos_8992.0.0_relm_recovery_canary-channel_mp-v7.bin\nParallel unsquashfs: Using 1 processor\n1134 inodes (7571 blocks) to write\n\n\ncreated 969 files\ncreated 235 directories\ncreated 165 symlinks\ncreated 0 devices\ncreated 0 fifos\n\ncwd=None\n

Looks like the pem file is missing.

java.io.FileNotFoundException: /tmp/signer.keydir.9G_fuk/cros/keys/RelmMPKeys-v7/android/platform.x509.pem 

--> vapier@: Who's looking at the signers nowadays?

i fixed those earlier today and re-queued the failing images