Eos: symbol lookup error: undefined symbol

1

Hi there,

The problems is, eos doesn’t launch at all on my machine, logging error about missing symbol:

$ eos
eos: symbol lookup error: eos: undefined symbol: _ZN5XrdCl3URLC1EPKc

I installed eos-client and all dependencies on Ubuntu 18.04.1 and Linux Mint 19.2 (which also based on 18.04). These are repos I’ve added by apt:

deb http://storage-ci.web.cern.ch/storage-ci/debian/eos/citrine/ bionic tag
deb http://storage-ci.web.cern.ch/storage-ci/debian/xrootd/ bionic release

This is what ‘dpkg -s eos-client’ says:

Package: eos-client
Status: install ok installed
Priority: optional
Section: misc
Installed-Size: 5066
Maintainer: Jozsef Makai <jozsef.makai@cern.ch>
Architecture: amd64
Source: eos
Version: 4.5.9
Depends: libattr1 (>= 1:2.4.46-8), libc6 (>= 2.14), libcurl4 (>= 7.16.2),
libgcc1 (>= 1:4.2), libprotobuf10, libreadline7 (>= 6.0), libssl1.1 (>= 1.1.0),
libstdc++6 (>= 6), libuuid1 (>= 2.16), xrootd-client-libs, xrootd-libs,
zlib1g (>= 1:1.2.3.3), systemd, xrootd-client
Conffiles:
 /etc/fuse.conf.eos 27aaec6299ba4ea3128381333b94acd2
Description: EOS client package
Homepage: http://eos.web.cern.ch/

I also looked at ‘ldd /usr/bin/eos’ output, but it didn’t find any unresolved shared libs.

So where the problem could be? Thanks!

2

Hello,

Most of the time when I’ve encountered this kind of symbol table problem it was because the xrootd-client installed on the machine is a different major version than the one eos-client was compiled against.

Could you post the xrootd version you have installed?

There was a problem with the Ubuntu repos where a xrootd-7.7.7 version was uploaded, which will not work. In case you have that version, please remove it and install either 4.10.1 or one of the latest release candidates (4.11.0-rc1 or 4.11.0-rc2).

E.g.:

apt-get install xrootd-client=4.10.1 xrootd-client-libs=4.10.1 xrootd-libs=4.10.1

Best Regards,
Mihai

3

This perfectly works, thanks!

4

The error came back, but this time xrootd-client=4.10.1 (and also 4.11.0) is not available anymore:

$ sudo apt-get install xrootd-client=4.10.1
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Version '4.10.1' for 'xrootd-client' was not found

So what should I do to work around the undefined symbol error?

$ sudo apt-get -y install eos-client 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  xrootd-client xrootd-client-libs xrootd-libs xrootd-server-libs
The following NEW packages will be installed:
  eos-client xrootd-client xrootd-client-libs xrootd-libs xrootd-server-libs
0 upgraded, 5 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/3 392 kB of archives.
After this operation, 12,9 MB of additional disk space will be used.
Selecting previously unselected package xrootd-libs.
... etc etc ...

telzhov@nu76-208 ~
$ eos
eos: symbol lookup error: eos: undefined symbol: _ZN9XrdSysDNS11getHostNameEPKcPPc

Thanks!

5

Hello,

This looks again like incompatible ABI between installed XRootD libraries and the libraries the EOS client was compiled against / expects.

Which version of eos-client and xrootd-client are you using?

I would recommend eos-client-4.6.8 together with xrootd-4.11.2.
This setup worked for me.

EOS repository: deb http://storage-ci.web.cern.ch/storage-ci/debian/eos/citrine/ bionic tag
XRootD repository: deb http://storage-ci.web.cern.ch/storage-ci/debian/xrootd/ bionic release

Note: the XRootD repo also contains version 5.0.0-rc1, which you should avoid.

Cheers,
Mihai

6

Ah, now I see the problem was in my eos.list:

deb [arch=amd64] http://storage-ci.web.cern.ch/storage-ci/debian/xrootd/ bionic master

So xrootd packages of version 4.11.2 were unavailable in this repo. Replacement master with release solved the problem.

Thank you!

Timur