enterprise-support team mailing list archive

[Andrea <andrelisci@xxxxxxxxx>]

Public bug reported:


browsing samba share fail NT_STATUS_IO_TIMEOUT on client side only on specific subdirectories inside a share

looking at wireshark on client side, the server miss SMB2 'Find
Response' after a 'Find Request File: Index2/Enterprise/P2
SMB_FIND_ID_BOTH_DIRECTORY_INFO Pattern: *' request

in this case listing the folder path 'Index2/Enterprise/P2' under
'mynetworkshare' share from a client side, got the timeout


looking on serverside for smbd processes 

 ps -aefw | grep smbd
usera  11356 24126  0 12:27 ?        00:00:00 /usr/sbin/smbd --foreground --no-process-group
root     18586 24126  0 16:19 ?        00:00:00 /usr/sbin/smbd --foreground --no-process-group
root     24126     1  0 Oct03 ?        00:00:00 /usr/sbin/smbd --foreground --no-process-group
root     24128 24126  0 Oct03 ?        00:00:09 /usr/sbin/smbd --foreground --no-process-group
root     24129 24126  0 Oct03 ?        00:00:00 /usr/sbin/smbd --foreground --no-process-group
root     24139 24126  0 Oct03 ?        00:00:00 /usr/sbin/smbd --foreground --no-process-group
root     24499 24126  0 Oct03 ?        00:03:02 /usr/sbin/smbd --foreground --no-process-group
root     24615 24126  0 Oct03 ?        00:02:49 /usr/sbin/smbd --foreground --no-process-group
usera  25581     1  0 Sep21 ?        00:00:13 /usr/sbin/smbd --foreground --no-process-group
root     28380  8773  0 16:39 pts/0    00:00:00 grep --color=auto smbd
usera  28410 24126  0 14:19 ?        00:00:00 /usr/sbin/smbd --foreground --no-process-group
usera  30280 24126  0 14:24 ?        00:00:27 /usr/sbin/smbd --foreground --no-process-group

and check 'usera' pids by lsof and filtering for samba document root,
seems to find files involved on the directory listing involved with the
timout

lsof -p 11356,25581,28410,30280 | grep opt\/samba

smbd    11356 usera  cwd       DIR               0,51     4096 13038926575565132978 /opt/samba/share/mynetworkshare
smbd    11356 usera   10r      DIR               0,51     4096 10381959745566703383 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2
smbd    25581 usera  cwd       DIR               0,51     4096 13038926575565132978 /opt/samba/share/mynetworkshare
smbd    25581 usera   27r      REG               0,51      852 12979494917769495112 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/livelink.22
smbd    25581 usera   39u      REG               0,51       11 13757545946466167183 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/livelink.ctl
smbd    25581 usera   40r      REG               0,51  1583664  9704199600817284546 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/accumLog.1
smbd    25581 usera   44r      REG               0,51  4063910 12036954814899122047 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/MODaccumLog.1
smbd    25581 usera   46u      REG               0,51   105309  9637570933862580747 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/1/coreobj.dat
smbd    25581 usera   47u      REG               0,51   305137 11017905758939296307 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/1/coreoff.dat
smbd    25581 usera   49u      REG               0,51     8887 10135057150036388979 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/1/coreskip.idx
smbd    25581 usera   50r      REG               0,51  4873203 11065466833306867067 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/MODcheckLog.0
smbd    25581 usera   51u      REG               0,51     1849 13073850013481250157 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/1/coreidx1.idx
smbd    25581 usera   52u      REG               0,51    43616 11417437259087223145 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/1/otherobj.dat
smbd    25581 usera   53u      REG               0,51   116513 12964205646912969054 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/1/otheroff.dat
smbd    25581 usera   54u      REG               0,51     3811 13644200039721141848 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/1/otherskip.idx
smbd    25581 usera   55u      REG               0,51      910 12320753658158512067 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/1/otheridx1.idx
smbd    25581 usera   56u      REG               0,51        0  9947148168314732658 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/1/regionobj.dat
smbd    25581 usera   57u      REG               0,51        0 12486901350105603972 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/1/regionoff.dat
smbd    25581 usera   58u      REG               0,51        0 12078852358539564894 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/1/regionskip.idx
smbd    25581 usera   59u      REG               0,51        0 11326616914780603369 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/1/regionidx1.idx
smbd    25581 usera   61u      REG               0,51   268082  9273695434388025801 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/MODindex/1/coreobj.dat
smbd    25581 usera   62u      REG               0,51   456013 11946849653214943722 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/MODindex/1/coreoff.dat
smbd    25581 usera   63u      REG               0,51    23600 10631198232544745061 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/MODindex/1/coreskip.idx
smbd    25581 usera   64u      REG               0,51   135435 11253899111274063607 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/MODindex/1/coreidx1.idx
smbd    25581 usera   65u      REG               0,51   537212 13570599415659801343 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/MODindex/1/otherobj.dat
smbd    25581 usera   66u      REG               0,51   893889 13354021437680018367 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/MODindex/1/otheroff.dat
smbd    25581 usera   67u      REG               0,51    40645 12910687493492508655 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/MODindex/1/otherskip.idx
smbd    25581 usera   68u      REG               0,51   836295  9874230618985030580 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/MODindex/1/otheridx1.idx
smbd    25581 usera   69u      REG               0,51     5301  9350909775579182602 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/MODindex/1/otheridx2.idx
smbd    25581 usera   70u      REG               0,51        0 10480458378791946435 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/MODindex/1/regionobj.dat
smbd    25581 usera   71u      REG               0,51        0 10536849453028932340 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/MODindex/1/regionoff.dat
smbd    25581 usera   72u      REG               0,51        0 11466714005613920107 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/MODindex/1/regionskip.idx
smbd    25581 usera   73u      REG               0,51        0 10594787178114352353 /opt/samba/share/mynetworkshare/Index2/Enterprise/P2/MODindex/1/regionidx1.idx
smbd    28410 usera  cwd       DIR               0,51     4096 13038926575565132978 /opt/samba/share/mynetworkshare
smbd    30280 usera  cwd       DIR               0,51     4096 13038926575565132978 /opt/samba/share/mynetworkshare
smbd    30280 usera   37u      REG               0,51       11 11371402119174226161 /opt/samba/share/mynetworkshare/Index1/Enterprise/P1/livelink.ctl
smbd    30280 usera   38u      REG               0,51       10 11244458627038375594 /opt/samba/share/mynetworkshare/Index3/Elib/P1/livelink.ctl

doing a strace on pid 25581, cause also strace to stuck into, and the
only way to detached il to do a kill -9 of strace pid

restarting samba solve the issue.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: samba 2:4.7.6+dfsg~ubuntu-0ubuntu2.2
ProcVersionSignature: Ubuntu 4.15.0-1020.20-aws 4.15.18
Uname: Linux 4.15.0-1020-aws x86_64
ApportVersion: 2.20.9-0ubuntu7.3
Architecture: amd64
Date: Thu Oct  4 16:26:59 2018
Ec2AMI: ami-ea9ab101
Ec2AMIManifest: (unknown)
Ec2AvailabilityZone: eu-central-1a
Ec2InstanceType: t2.2xlarge
Ec2Kernel: unavailable
Ec2Ramdisk: unavailable
ExecutablePath: /usr/sbin/smbd
ProcEnviron:
 LANG=C.UTF-8
 PATH=(custom, no user)
SambaServerRegression: Yes
SmbConfIncluded: No
SourcePackage: samba
TestparmExitCode: 0
UbuntuFailedConnect: Yes
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: samba (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic ec2-images

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https://bugs.launchpad.net/bugs/1796142

Title:
  browsing samba share got NT_STATUS_IO_TIMEOUT only on specific
  subfolder inside share

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