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https://issues.apache.org/jira/browse/HDFS-420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13052531#comment-13052531
]
Hudson commented on HDFS-420:
-----------------------------
Integrated in Hadoop-Hdfs-trunk #702 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk/702/])
HDFS-420. Fuse-dfs should cache fs handles. Contributed by Brian Bockelman
and Eli Collins
eli : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1137675
Files :
* /hadoop/common/trunk/hdfs/src/contrib/build-contrib.xml
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/src/fuse_impls_unlink.c
* /hadoop/common/trunk/hdfs/CHANGES.txt
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/src/fuse_impls_getattr.c
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/src/fuse_impls_release.c
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/src/fuse_impls_utimens.c
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/src/fuse_options.c
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/src/fuse_stat_struct.c
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/src/fuse_dfs_wrapper.sh
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/src/fuse_impls_rename.c
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/src/fuse_impls_mkdir.c
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/src/fuse_impls_statfs.c
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/src/fuse_impls_rmdir.c
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/build.xml
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/src/fuse_users.c
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/src/fuse_init.c
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/src/fuse_impls_access.c
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/configure.ac
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/src/fuse_impls_truncate.c
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/src/fuse_connect.c
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/src/fuse_impls_readdir.c
* /hadoop/common/trunk/hdfs/src/contrib/build.xml
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/src/fuse_impls_open.c
* /hadoop/common/trunk/hdfs/src/c++/libhdfs/hdfs.c
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/src/fuse_connect.h
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/src/fuse_dfs.c
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/src/fuse_impls_chmod.c
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/src/fuse_impls_chown.c
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/src/fuse_context_handle.h
* /hadoop/common/trunk/hdfs/src/contrib/fuse-dfs/src/fuse_dfs.h
> Fuse-dfs should cache fs handles
> --------------------------------
>
> Key: HDFS-420
> URL: https://issues.apache.org/jira/browse/HDFS-420
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: contrib/fuse-dfs
> Affects Versions: 0.20.2
> Environment: Fedora core 10, x86_64, 2.6.27.7-134.fc10.x86_64 #1 SMP
> (AMD 64), gcc 4.3.2, java 1.6.0 (IcedTea6 1.4 (fedora-7.b12.fc10-x86_64)
> Runtime Environment (build 1.6.0_0-b12) OpenJDK 64-Bit Server VM (build
> 10.0-b19, mixed mode)
> Reporter: Dima Brodsky
> Assignee: Brian Bockelman
> Fix For: 0.23.0
>
> Attachments: fuse_dfs_020_memleaks.patch,
> fuse_dfs_020_memleaks_v3.patch, fuse_dfs_020_memleaks_v8.patch,
> hdfs-420-1.patch, hdfs-420-2.patch, hdfs-420-3.patch
>
>
> Fuse-dfs should cache fs handles on a per-user basis. This significantly
> increases performance, and has the side effect of fixing the current code
> which leaks fs handles.
> The original bug description follows:
> I run the following test:
> 1. Run hadoop DFS in single node mode
> 2. start up fuse_dfs
> 3. copy my source tree, about 250 megs, into the DFS
> cp -av * /mnt/hdfs/
> in /var/log/messages I keep seeing:
> Dec 22 09:02:08 bodum fuse_dfs: ERROR: hdfs trying to utime
> /bar/backend-trunk2/src/machinery/hadoop/output/2008/11/19 to
> 1229385138/1229963739
> and then eventually
> Dec 22 09:03:49 bodum fuse_dfs: ERROR: could not connect to dfs
> fuse_dfs.c:1333
> Dec 22 09:03:49 bodum fuse_dfs: ERROR: could not connect to dfs
> fuse_dfs.c:1333
> Dec 22 09:03:49 bodum fuse_dfs: ERROR: could not connect to dfs
> fuse_dfs.c:1037
> Dec 22 09:03:49 bodum fuse_dfs: ERROR: could not connect to dfs
> fuse_dfs.c:1333
> Dec 22 09:03:49 bodum fuse_dfs: ERROR: could not connect to dfs
> fuse_dfs.c:1037
> Dec 22 09:03:49 bodum fuse_dfs: ERROR: could not connect to dfs
> fuse_dfs.c:1333
> Dec 22 09:03:49 bodum fuse_dfs: ERROR: could not connect to dfs
> fuse_dfs.c:1209
> Dec 22 09:03:49 bodum fuse_dfs: ERROR: could not connect to dfs
> fuse_dfs.c:1037
> Dec 22 09:03:49 bodum fuse_dfs: ERROR: could not connect to dfs
> fuse_dfs.c:1037
> Dec 22 09:03:49 bodum fuse_dfs: ERROR: could not connect to dfs
> fuse_dfs.c:1037
> Dec 22 09:03:49 bodum fuse_dfs: ERROR: could not connect to dfs
> fuse_dfs.c:1037
> Dec 22 09:03:49 bodum fuse_dfs: ERROR: could not connect to dfs
> fuse_dfs.c:1037
> Dec 22 09:03:49 bodum fuse_dfs: ERROR: could not connect to dfs
> fuse_dfs.c:1037
> Dec 22 09:03:49 bodum fuse_dfs: ERROR: could not connect to dfs
> fuse_dfs.c:1037
> Dec 22 09:03:49 bodum fuse_dfs: ERROR: could not connect to dfs
> fuse_dfs.c:1037
> Dec 22 09:03:49 bodum fuse_dfs: ERROR: could not connect to dfs
> fuse_dfs.c:1037
> Dec 22 09:03:49 bodum fuse_dfs: ERROR: could not connect to dfs
> fuse_dfs.c:1209
> Dec 22 09:03:49 bodum fuse_dfs: ERROR: could not connect to dfs
> fuse_dfs.c:1037
> Dec 22 09:03:49 bodum fuse_dfs: ERROR: could not connect to dfs
> fuse_dfs.c:1037
> Dec 22 09:03:49 bodum fuse_dfs: ERROR: could not connect to dfs
> fuse_dfs.c:1037
> Dec 22 09:03:49 bodum fuse_dfs: ERROR: could not connect to dfs
> fuse_dfs.c:1333
> Dec 22 09:03:49 bodum fuse_dfs: ERROR: could not connect to dfs
> fuse_dfs.c:1209
> Dec 22 09:03:49 bodum fuse_dfs: ERROR: could not connect to dfs
> fuse_dfs.c:1037
> and the file system hangs. hadoop is still running and I don't see any
> errors in it's logs. I have to unmount the dfs and restart fuse_dfs and then
> everything is fine again. At some point I see the following messages in the
> /var/log/messages:
> ERROR: dfs problem - could not close file_handle(139677114350528) for
> /bar/backend-trunk2/src/machinery/hadoop/input/2008/12/14/actionrecordlog-8339-93825052368848-1229278807.log
> fuse_dfs.c:1464
> Dec 22 09:04:49 bodum fuse_dfs: ERROR: dfs problem - could not close
> file_handle(139676770220176) for
> /bar/backend-trunk2/src/machinery/hadoop/input/2008/12/14/actionrecordlog-8140-93825025883216-1229278759.log
> fuse_dfs.c:1464
> Dec 22 09:05:13 bodum fuse_dfs: ERROR: dfs problem - could not close
> file_handle(139677114812832) for
> /bar/backend-trunk2/src/machinery/hadoop/input/2008/12/14/actionrecordlog-8138-93825070138960-1229251587.log
> fuse_dfs.c:1464
> Is this a known issue? Am I just flooding the system too much. All of this
> is being performed on a single, dual core, machine.
> Thanks!
> ttyl
> Dima
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