Environment: otoro- 7/24/2012 build gaia app - Music Device Storage is returning null. The repro case is to load audio in /sdcard/Music, and then start the Music app E/GeckoConsole( 106): Content JS ERROR at app://music.thisdomaindoesnotexist.org/js/MediaDB.js:197 in MediaDB: MediaDB(): can't get DeviceStorage object TypeError: navigator.getDeviceStorage(mediaType) is null This might also not be a device storage error as much as a permsissions error, unsure, but i verified the permissions to device storage are correct in permissions.sqlite 173|music.thisdomaindoesnotexist.org|indexedDB-unlimited|1|0|0 174|music.thisdomaindoesnotexist.org|webapps-manage|1|0|0 175|music.thisdomaindoesnotexist.org|offline-app|1|0|0 176|music.thisdomaindoesnotexist.org|pin-app|1|0|0 177|music.thisdomaindoesnotexist.org|websettings-read|1|0|0 178|music.thisdomaindoesnotexist.org|websettings-readwrite|1|0|0 179|music.thisdomaindoesnotexist.org|content-camera|1|0|0 180|music.thisdomaindoesnotexist.org|webcontacts-manage|1|0|0 181|music.thisdomaindoesnotexist.org|wifi-manage|1|0|0 182|music.thisdomaindoesnotexist.org|desktop-notification|1|0|0 183|music.thisdomaindoesnotexist.org|geolocation|1|0|0 184|music.thisdomaindoesnotexist.org|device-storage|1|0|0 185|music.thisdomaindoesnotexist.org|alarms|1|0|0
Verified this is happening with Video App as well, and a similar error is being returned.
logcat output: I/Vold ( 100): /dev/block/vold/179:1 being considered for volume sdcard D/Vold ( 100): Volume sdcard state changing 1 (Idle-Unmounted) -> 3 (Checking) W/SocketClient( 100): write error (Broken pipe) W/SocketClient( 100): Unable to send msg '605 Volume sdcard /mnt/sdcard state changed from 1 (Idle-Unmounted) to 3 (Checking)' W/SocketListener( 100): Error sending broadcast (Broken pipe)
dclarke, does your device have a sdcard installed? If not, then everything is working as expected.
Yes it does. I can adb shell cd /sdcard/Music ls -al shows many files
Doug are you running the latest otoro build from releases.mozilla ? Taht would be a good place to start.
Doug are you running the latest otoro build from releases.mozilla ? that would be a good place to start.
if the volume manager says that the sdcard isn't present, we return a null storage object for all types (video, pictures, music)
I figured out the problem. The nsVolumeService class doesn't get instantiated until the very first time that: do_GetService(NS_VOLUMESERVICE_CONTRACTID) is called. The nsVolumeService constructor then fires off some IOTHread initialization. If the call to GetVolumeByPath comes in before the iothread has had a chance to finish, then it see no volume. So I see a few potential solutions: 1 - Have the VolumeManager do a call to do_GetService to have the nsVolumeService instantiated earlier. 2 - Have the nsVolumeService do some type of synchronization so that GetVolumeByPath blocks until the iothread is finished 3 - Move the main thread data out of nsVolumeService and have the main thread data initialized earlier, so that nsVolumeService can access it immediately. I'm inclined to do #3. Comments?
4 - You could just add the volume service to app-startup. This would create your service on startup and you don't have to do anything else. Not sure about the impact on startup perf though.
Created attachment 650347 [details] [diff] [review] Bug 777259 - Launch VolumeService earlier to prevent races on retrieving Volume information
Comment on attachment 650347 [details] [diff] [review] Bug 777259 - Launch VolumeService earlier to prevent races on retrieving Volume information works great.
Let us know when this makes it into the tree
I pushed it to mozilla-inbound: https://hg.mozilla.org/integration/mozilla-inbound/rev/4a08177931d2 As long as no build failures occur, it should be on mozilla-central tomorrow morning.