owt-client-native execute gclient sync failed

[Wang__YueJie]

I was going to build a android library. And I checkout the owt-client-native to branch 4.2.x which is support to build android.

Run gclient sycn after I download the depot_tools and configure the .gclient，the throws error:

[1:28:35] Still working on:
[1:28:35]   src/third_party
Syncing projects:   5% ( 7/136) src/third_party

src/buildtools (ERROR)
----------------------------------------
[0:00:56] Started.
[0:00:56] 

________ running 'git -c core.deltaBaseCacheLimit=512m clone --no-checkout --progress https://chromium.googlesource.com/chromium/src/buildtools /root/video/owt-client-native-build/src/_gclient_buildtools_CLpR1E' in '/root/video/owt-client-native-build'
[0:00:56] Cloning into '/root/video/owt-client-native-build/src/_gclient_buildtools_CLpR1E'...
[0:00:56] remote: Enumerating objects: 195, done.
[0:00:56] Receiving objects:   0% (1/195)   
[0:00:56] Receiving objects:  10% (20/195)   
[0:00:56] remote: Total 195 (delta 0), reused 0 (delta 0)
[0:00:56] Receiving objects: 100% (195/195)   
[0:00:56] Resolving deltas:   5% (5/90)   
[0:00:56] Resolving deltas:  21% (19/90)   
[0:00:56] Resolving deltas: 100% (90/90)   
[0:00:56] Checking connectivity... done
[0:00:56] _____ Conflicting directory found in /root/video/owt-client-native-build/src/buildtools. Moving to /root/video/owt-client-native-build/_bad_scm/src/buildtoolsGaGK5q.
[0:00:56] 

________ running 'git -c core.deltaBaseCacheLimit=512m clone --no-checkout --progress https://chromium.googlesource.com/chromium/src/buildtools /root/video/owt-client-native-build/src/_gclient_buildtools_1j26E6' in '/root/video/owt-client-native-build'
[0:00:56] Cloning into '/root/video/owt-client-native-build/src/_gclient_buildtools_1j26E6'...
[0:00:57] remote: Enumerating objects: 195, done.
[0:00:57] Receiving objects:   0% (1/195)   
[0:00:57] Receiving objects:  10% (20/195)   
[0:00:57] remote: Total 195 (delta 0), reused 0 (delta 0)
[0:00:57] Receiving objects: 100% (195/195)   
[0:00:57] Resolving deltas:   5% (5/90)   
[0:00:57] Resolving deltas:  21% (19/90)   
[0:00:57] Resolving deltas: 100% (90/90)   
[0:00:57] Checking connectivity... done
----------------------------------------
Error: Command 'git checkout --quiet cf454b247c611167388742c7a31ef138a6031172' returned non-zero exit status 128 in /root/video/owt-client-native-build/src/buildtools
fatal: reference is not a tree: cf454b247c611167388742c7a31ef138a6031172

Warnings:
Conflicting directory /root/video/owt-client-native-build/src/buildtools moved to /root/video/owt-client-native-build/_bad_scm/src/buildtoolsGaGK5q.
Conflicting directory /root/video/owt-client-native-build/src/testing moved to /root/video/owt-client-native-build/_bad_scm/src/testingp6YnNX.
Conflicting directory /root/video/owt-client-native-build/src/build moved to /root/video/owt-client-native-build/_bad_scm/src/buildVYVdNE.
Conflicting directory /root/video/owt-client-native-build/src/base moved to /root/video/owt-client-native-build/_bad_scm/src/basea5E7nO.
Conflicting directory /root/video/owt-client-native-build/src/tools moved to /root/video/owt-client-native-build/_bad_scm/src/toolsUIEHQF.
Conflicting directory /root/video/owt-client-native-build/src/third_party moved to /root/video/owt-client-native-build/_bad_scm/src/third_partyVR1fkG.
root@ubuntu:~/video/owt-client-native-build#

Is that someting wrong about "reference is not a tree: cf454b247c611167388742c7a31ef138a6031172"?

[YanbinZ_Intel]

Could you please double confirm your network connection , may be you need setup proxy .

Thanks

Yanbin