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https://issues.apache.org/jira/browse/TS-2138?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13743151#comment-13743151
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Phil Sorber commented on TS-2138:
---------------------------------
I can reproduce this behavior, but I don't think what I am seeing is actually
an issue. If I kill traffic_server before it sync's the directory I get the
described behavior. But if I wait long enough it behaves as expected. Can you
confirm that the directory is getting sync'd before you kill traffic_server?
You can use the (cache_dir_sync) debug tag.
{noformat}
[Aug 18 05:48:31.009] Server {0x7f0bb266b700} DEBUG: (cache_dir_sync) sync
started
[Aug 18 05:48:31.009] Server {0x7f0bb266b700} DEBUG: (cache_dir_sync) Dir
/dev/sdk 172032:109805547 not dirty
[Aug 18 05:48:31.009] Server {0x7f0bb266b700} DEBUG: (cache_dir_sync) sync
started
[Aug 18 05:48:31.009] Server {0x7f0bb266b700} DEBUG: (cache_dir_sync) Dir
/dev/sdo 172032:109805547 not dirty
[Aug 18 05:48:31.009] Server {0x7f0bb266b700} DEBUG: (cache_dir_sync) sync
started
[Aug 18 05:48:31.009] Server {0x7f0bb266b700} DEBUG: (cache_dir_sync) Dir
/dev/sde 172032:109805547: waiting for agg buffer
[Aug 18 05:48:31.009] Server {0x7f0ba68e8700} DEBUG: (cache_dir_sync) sync
started
[Aug 18 05:48:31.009] Server {0x7f0ba68e8700} DEBUG: (cache_dir_sync) pos:
137456640 Dir /dev/sde 172032:109805547 dirty...syncing to disk
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) sync
started
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) Dir
/dev/sdh 172032:109805547 not dirty
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) sync
started
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) Dir
/dev/sdi 172032:109805547 not dirty
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) sync
started
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) Dir
/dev/sdr 172032:109805547 not dirty
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) sync
started
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) Dir
/dev/sdd 172032:109805547 not dirty
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) sync
started
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) Dir
/dev/sdp 172032:109805547 not dirty
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) sync
started
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) Dir
/dev/sdu 172032:109805547 not dirty
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) sync
started
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) Dir
/dev/sdl 172032:109805547 not dirty
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) sync
started
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) Dir
/dev/sdq 172032:109805547 not dirty
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) sync
started
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) Dir
/dev/sdn 172032:109805547 not dirty
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) sync
started
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) Dir
/dev/sds 172032:109805547 not dirty
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) sync
started
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) Dir
/dev/sdt 172032:109805547 not dirty
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) sync
started
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) Dir
/dev/sdj 172032:109805547 not dirty
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) sync
started
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) Dir
/dev/sdm 172032:109805547 not dirty
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) sync
started
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) Dir
/dev/sdg 172032:109805547 not dirty
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) sync
started
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) Dir
/dev/sdf 172032:109805547 not dirty
[Aug 18 05:48:48.558] Server {0x7f0bb2d72700} DEBUG: (cache_dir_sync) sync done
{noformat}
Once that happens then cached objects persist across restarts.
> when restart ats, all data will be lost, miss return
> -----------------------------------------------------
>
> Key: TS-2138
> URL: https://issues.apache.org/jira/browse/TS-2138
> Project: Traffic Server
> Issue Type: Bug
> Components: Cache
> Reporter: bettydramit
> Attachments: ts-3.3.5-40.spec
>
>
> ENV: centos 6 x86_64 gitmaster and
> http://people.apache.org/~zwoop/rel-candidates/trafficserver-3.3.5-dev.tar.bz2
> ./configure --enable-layout=Gentoo --libdir=%{_libdir}/trafficserver
> --enable-linux-native-aio --enable-reclaimable-freelist
>
> when restart ats ,my all hit data will be lost.
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