'adb wait-for-device' returns too early causing subsequent 'adb shell' to report "error: protocol fault (no status)"
Bug #1358784 reported by
James Hunt
This bug affects 1 person
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| android-tools (Ubuntu) |
New
|
Undecided
|
Unassigned | ||
Bug Description
$ adb wait-for-device && adb shell
error: protocol fault (no status)
$ echo $?
$ adb version
Android Debug Bridge version 1.0.31
ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: android-tools-adb 4.2.2+git201302
ProcVersionSign
Uname: Linux 3.16.0-9-generic x86_64
ApportVersion: 2.14.6-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Aug 19 15:45:56 2014
InstallationDate: Installed on 2014-04-11 (129 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Daily amd64 (20140409)
SourcePackage: android-tools
UpgradeStatus: Upgraded to utopic on 2014-05-08 (103 days ago)
Revision history for this message
| James Hunt (jamesodhunt) wrote | #1 |
| summary: |
- 'adb wait-for-device' occasionally fails returning 'error: protocol - fault (no status)' + 'adb wait-for-device' returns too early |
Revision history for this message
| James Hunt (jamesodhunt) wrote Re: 'adb wait-for-device' returns too early | #2 |
| summary: |
- 'adb wait-for-device' returns too early + 'adb wait-for-device' returns too early causing subsequent 'adb shell' + to report "error: protocol fault (no status)" |
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It's actually the subsequent 'adb shell' which is producing the protocol fault error:
$ adb wait-for-device && echo $? && adb shell
0
error: protocol fault (no status)
$ echo $?
1
'adb help' describes wait-for-device as, "block until device is online". The meaning of 'online' however is not defined. It either means:
(1) the device has reached some sequence point in its boot path.
(2) the device is ready to accept 'adb shell' connections.
I'm guessing it actually means (1). However, users would expect it to mean (2) to be useful.
A rather awful work-around for current behaviour:
$ adb wait-for-device && while ! adb shell true; do sleep 1; done && adb shell