Attila wrote on Tue, Jul 13, 2021 at 23:48:48 +0200: > Hi > > I have a problem getting the svn log in a branch after sync-merging a commit > from trunk. > This commit in trunk is a merge of an old and complex branch with many > commits. > > The client accessing the repository over svn:// url. > (paths and text is redacted) > The head revision is: 10801 > > When I run the following command on the client (in the working copy), it > prints a long partial xml-log output, then hangs. > /usr/bin/svn log --xml -g -v -r 10701:HEAD /path/to/branch-wc > > When observing in "top", the command uses no visible CPU resources on hang. > (I waited ca. 2 minutes) > The hanging command does mot exits on CTRL-c, it does not exits on "kill > -TERM pid", I have to send "kill -KILL pid" to terminate it. > > When I run the command with strace it hangs at read(4, > ...SNIP... > read(4, " ( ) ( 4:file true false ) ) ( 1"..., 16384) = 16384 > mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = > 0x7f63f1d83000 > mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = > 0x7f63f1d81000 > mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = > 0x7f63f1d7f000 > mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = > 0x7f63f1d7d000 > mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = > 0x7f63f1d7b000 > mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = > 0x7f63f1d79000 > read(4, "***/****-***_redacted_*****_****"..., 16384) = 14773 > mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = > 0x7f63f1d77000 > mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = > 0x7f63f1d75000 > mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = > 0x7f63f1d73000 > mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = > 0x7f63f1d71000 > mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = > 0x7f63f1d6f000 > mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = > 0x7f63f1d6d000 > read(4, > > When I observe the server, there is a CPU activity at the begin, but when the > client hangs, the server seems to be in idle. > Just a corresponding svnserve process is there with no visible cpu usage. > In svnserve.log is nothing relevant to see. > > The svnserve command is: > svnserve -d -r /path/to/repositories \ > --log-file=/var/log/svnserve.log \ > --memory-cache-size 1024 \ > --cache-txdeltas yes \ > --cache-fulltexts yes > > When I try to get the xml-log on the server with the corresponding file:// > repository URL: > /usr/bin/svn log --xml -g -v -r 10701:HEAD > file://path/to/local/repositories/project/branch > The command finishes in ca 5-10 seconds and I get the xml output, but the > output has a way too many </logentry> lines. > > There are 1217 occurrences of the string “<logentry" and 33191 occurrences of > the string "</logentry>" in the output xml. > There are several thousand lines of </logentry> in a row in many places in > repeated blocks. > > Details: > Client and Server OS: > Linux 4.19.0-8-amd64 #1 SMP Debian 4.19.98-1+deb10u1 (2020-04-27) x86_64 > GNU/Linux > > The repository is ca. 4 GB. > Running "svnadmin verify" on the server founds no errors. > I have no other problems with the server, checkout and commit works normal. > > svn --version > svn, version 1.10.4 (r1850624) > compiled Feb 10 2021, 20:15:45 on x86_64-pc-linux-gnu > > Copyright (C) 2019 The Apache Software Foundation. > This software consists of contributions made by many people; > see the NOTICE file for more information. > Subversion is open source software, see http://subversion.apache.org/ > > The following repository access (RA) modules are available: > > * ra_svn : Module for accessing a repository using the svn network protocol. > - with Cyrus SASL authentication > - handles 'svn' scheme > * ra_local : Module for accessing a repository on local disk. > - handles 'file' scheme > * ra_serf : Module for accessing a repository via WebDAV protocol using serf. > - using serf 1.3.9 (compiled with 1.3.9) > - handles 'http' scheme > - handles 'https' scheme > > The following authentication credential caches are available: > > * Plaintext cache in /home/username/.subversion > * Gnome Keyring > * GPG-Agent > * KWallet (KDE) > > > Googling around gives me these two somewhat related hits: > https://issues.apache.org/jira/browse/SVN-4856 > https://issues.apache.org/jira/browse/SVN-4711 > > But I do'nt use the --search parameter. > > Is this a bug or are there any suggestions how to solve this problem?
It could be SVN-4856, which doesn't use --search either, or it could be something else that happens whenever the output is large enough. Could you try «svn log -v -r HEAD:0 '^/' >/dev/null» without -g? That might not actually be large enough (considering HEAD is ≈11k and your output had ≈33k cases of </logentry>), so you might have to create a test repository with sufficiently many dummy commits. Aside: I just added to SVN-4856 a Unix port of the regression test. It would be nice to port it into tests/cmdline/ too; any volunteers? Cheers, Daniel
