I have multithreaded application, it is working fine at my development server (HP-UX). When it is deployed to client server it gives the following error:
. Process 16448. Starting (CONT) Thread: 0 /usr/lib/pa20_64/dld.sl:
Unsatisfied code ymbol 'pthread_create' in load module 'bin/CCQO'.
Killed
I fond that libpthread.1 at customer server does not have pthread_create method with nm command. This from client server:
/usr/lib/pa20_64 > nm -g libpthread.1 | grep 'pthread_cre'
[475] | 4611686018427436512| 1116|FUNC |GLOB |0|.text|__pthread_create_system
But when I run the same command on my development server I get following output:
[733] | 4611686018427467256| 2160|FUNC |GLOB |0| .text|__pthread_create_generic
[712] | 4611686018427467192| 64|FUNC |GLOB |0| .text|__pthread_create_system
[625] | 4611686018427467112| 64|FUNC |WEAK |0| .text|pthread_create
I tried to copy libraries from my server to client server but it does not work.
Please me know how can I now the version of threading library at my machine and at client machine ?
How can I update client machine with updated library ?
Can copying my libraries to other server, solve the issue ? If yes, then what are steps.
I fond that libpthread.1 at customer server does not have pthread_create method with nm command.
Your customer's libpthread.1 is corrupt. Perhaps the customer ran strip, or molested it in some other way.
Can copying my libraries to other server, solve the issue ?
This can render the machine un-bootable, and you should almost certainly not do that.
The right solution is for the customer's sysadmin to restore system libraries from his HP-UX media.
Related
Q1. What versions are we using?
Ans.
Python 3.6.12
OS : CentOS 7 64-bit
DB : Oracle 18c
Django 2.2
cx_Oracle : 8.1.0
Q2. Describe the problem
Ans. While running server with "python3 manage.py runserver"
application is able to contact Oracle DB and show the Django Administration page and login also works.
But when we access the application using the Apache (HTTPD) based URL over secure SSL port, we do see the Django page and the admin page as well but Login to Admin page with Internal server error.
In the logs, we see
"django.db.utils.DatabaseError: Error while trying to retrieve text for error ORA-01804"
cx_oracle is otherwise able to connect to the database properly, another application is also using the same database behind the same httpd proxy and works fine
Q3. Show the directory listing where your Oracle Client libraries are installed (e.g. the Instant Client directory). Is it 64-bit or 32-bit?
Ans. 64-bit
Q4. Show what the PATH environment variable (on Windows) or LD_LIBRARY_PATH (on Linux) is set to?
LD_LIBRARY_PATH=/srv/vol/db/oracle/product/18.0.0/dbhome_1/lib:/lib:/usr/lib
PATH=$ORACLE_HOME/bin:/srv/vol/db/oracle/product/18.0.0/dbhome_1/lib:$PATH
Q5. Show any Oracle environment variables set (e.g. ORACLE_HOME, ORACLE_BASE).
ORACLE_HOME=/srv/vol/db/oracle/product/18.0.0/dbhome_1
TNS_ADMIN=$ORACLE_HOME/network/admin
NLS_LANG=AMERICAN_AMERICA.AL32UTF8
ORACLE_BASE=/srv/vol/db/oracle
CLASSPATH=$ORACLE_HOME/jlib:$ORACLE_HOME/rdbms/jlib:$ORACLE_HOME/lib
Any suggestions/help is highly appreciated.
Thank you
I found the problem
So I just removed all the variable declarations from /etc/sysconfig/httpd and checked, the application was still able to access the lib files, so these were now redundant.
Then undid all variable declarations done earlier in .localsh and .localrc files for the os users. To start from scratch, and go step by step to see where it breaks.
So now, cx_Oracle was looking for the lib files in wrong directory
$ORACLE_HOME/client_1/lib
instead of
$ORACLE_HOME/lib
DPI-1047: Cannot locate a 64-bit Oracle Client library: "$ORACLE_HOME/client_1/lib/libclntsh.so: cannot open shared object file: No such file or directory". See https://cx-oracle.readthedocs.io/en/latest/user_guide/installation.html for help
I did not have any subfolder named "client_1" inside dbhome_1
so I just created a symlink client_1 that points to dbhome_1 (still unsure on this, but at least it works :) )
So, now, this error was gone but now again ORA-01804 was coming. 😑
I had read somewhere that this error can be fixed by adding "libociei.so" but I did not have one on my instance, so I generated it using these commands:-
mkdir -p $ORACLE_HOME/rdbms/install/instantclient/light
cd $ORACLE_HOME/rdbms/lib
make -f ins_rdbms.mk igenliboci
Then I just moved this libociei.so file from
$ORACLE_HOME/instantclient to $ORACLE_HOME/lib
Now there was a new error (so.. progress 😉 ):
ORA-12546 - TNS Permission Denied.
This was easy to solve 😀
I used this command to address this :-
setsebool -P httpd_can_network_connect on
And...... That was all! It worked.
We have a very stateful NodeJS based web server (Meteor) that occasionally, randomly becomes slow in production. The problem is not reproducible in any of our tests, and we don't know what's triggering it.
To diagnose this, we are using the v8-profiler package. This lets us trigger a 10-second CPU profile and download it for offline analysis.
Despite not having received any commits in 3 years, the package used to work fairly well. It has given us compilation trouble in the past, and now it looks like it stopped compiling entirely, breaking our build. The build happens inside a Docker container with all versions pinned, including NodeJS and v8-profiler itself, so it's unlikely that we can fix this on our end.
I'm thinking there must be some alternative, better maintained approach. But where is it?
(Note that restarting the server with additional flags (like --profile) is not an option, because it destroys all the evidence of the problem.)
I found there has been v8-profiler-next which is a successor of v8-profiler.
I hope this works for you.
I just built a tool for this. Called ntop, so it's like "top" but for Node apps https://github.com/DVLP/ntop
The below will enable communication with the CLI. This is designed to not add any overhead when the CLI tool is not used so it can be used in production. The profiler connects/disconnects immediately only when the CLI is doing the profiling.
The app:
import * as ntop from 'ntop'
ntop()
CLI shortcut to get a list of PIDs for convenience:
npx ntop
Outputs PIDs and additionally the command used to create the process for easier recognition.
Process detected at 12345 Details: node ./src/index.js --port 8216
npx ntop 12345
Outputs a list like "Bottom Up" in Chrome Dev Tools
(garbage collector) | 16.101ms |
shift | 10.038ms | node:internal/priority_queue:98:7
(anonymous) | 9.192ms | file:///home/app/src/controllers/Server.js:24:29
utils.bulkPreparePacket | 4.924ms | file:///home/app/src/Utils.js:91:26
preparePacket | 4.776ms | file:///home/app/src/Model.js:98:54
baseGetTag | 1.727ms | file:///home/app/node_modules/lodash/lodash.js:3104:23
(anonymous) | 1.702ms | evalmachine.:3:14
isPrototype | 1.441ms | file:///home/app/node_modules/lodash/lodash.js:6441:24
(program) | 1.411ms |
percolateDown | 1.124ms | node:internal/priority_queue:40:15
I've been at it for days but could not solve my problem.
I am running:
mpiexec -hostfile ~/machines -nolocal -pernode mkdir -p $dstpath where $dstpath points to current directory and "machines" is a file containing:
node01
node02
node03
node04
This is the error output:
Failed to parse XML input with the minimalistic parser. If it was not
generated by hwloc, try enabling full XML support with libxml2.
[node01:06177] [[6421,0],0] ORTE_ERROR_LOG: Error in file base/plm_base_launch_support.c at line 891
--------------------------------------------------------------------------
ORTE was unable to reliably start one or more daemons.
This usually is caused by:
* not finding the required libraries and/or binaries on
one or more nodes. Please check your PATH and LD_LIBRARY_PATH
settings, or configure OMPI with --enable-orterun-prefix-by-default
* lack of authority to execute on one or more specified nodes.
Please verify your allocation and authorities.
* the inability to write startup files into /tmp (--tmpdir/orte_tmpdir_base).
Please check with your sys admin to determine the correct location to use.
* compilation of the orted with dynamic libraries when static are required
(e.g., on Cray). Please check your configure cmd line and consider using
one of the contrib/platform definitions for your system type.
* an inability to create a connection back to mpirun due to a
lack of common network interfaces and/or no route found between
them. Please check network connectivity (including firewalls
and network routing requirements).
--------------------------------------------------------------------------
[node01:06177] 1 more process has sent help message help-errmgr-base.txt / failed-daemon-launch
[node01:06177] Set MCA parameter "orte_base_help_aggregate" to 0 to see all help / error messages
Failed to parse XML input with the minimalistic parser. If it was not
generated by hwloc, try enabling full XML support with libxml2.
[node01:06181] [[6417,0],0] ORTE_ERROR_LOG: Error in file base/plm_base_launch_support.c at line 891
I have 4 machines, node01 to node04. In order to log into these 4 nodes, I have to first log in to node00. I am trying to run some distributed graph functions. The graph software is installed in node01 and is supposed to be synchronised to the other nodes using mpiexec.
What I've done:
Made sure all passwordless login are setup, every machine can ssh to any other machine with no issues.
Have a hostfile in the home directory.
echo $PATH gives /home/myhome/bin:/home/myhome/.local/bin:/usr/include/openmpi:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
echo $LD_LIBRARY_PATH gives
/usr/lib/openmpi/lib
This has previously worked before, but it just suddenly started giving these errors. I got my administrator to install fresh machines but it still gave such errors. I've tried doing it one node at a time but it gave the same errors. I'm not entirely familiar with command line at all so please give me some suggestions. I've tried reinstalling OpenMPI from source and from sudo apt-get install openmpi-bin. I'm on Ubuntu 16.04 LTS.
You should focus on fixing:
Failed to parse XML input with the minimalistic parser. If it was not
generated by hwloc, try enabling full XML support with libxml2.
[node01:06177] [[6421,0],0] ORTE_ERROR_LOG: Error in file base/plm_base_launch_support.c at line 891
I downloaded and unziped the titan.zip and used the command ./titan.sh -v start. Now I get the output:
./titan.sh -v start
Forking Cassandra...
OpenJDK 64-Bit Server VM warning: The UseParNewGC flag is deprecated and will likely be removed in a future release
Running nodetool statusthrift.Error: Config file not found: /usr/lib64/jvm/java-1.9.0-openjdk-1.9.0/jre/conf/management/management.properties
...... timeout exceeded (60 seconds)
See /home/hausi/Documents/titan-0.5.4-hadoop2/bin/../log/cassandra.log for Cassandra log output.
The file management.properties does not exist on my machine. I could find any information about. Is it necessary to run Titan? How can I create it?
Little of topic bonus question: Since the company behind Titan was bought, will the database developmend be stopped?
It looks like you are running JDK9?
/usr/lib64/jvm/java-1.9.0-openjdk-1.9.0/jre/conf/management/management.properties
If I'm not misreading that, I think the answer is to downgrade to JDK7 or JDK8.
Since the company behind Titan was bought, will the database development be stopped?
The short answer is "no" and that development will continue. Please read:
https://groups.google.com/d/msg/aureliusgraphs/WTNYYpUyrvw/pZh02Q2LlpsJ
I am starting to test proof of concept exploits in my VM. I came across this Microsoft animated cursor vuln - MS07-017.
I saw the process in exploit-db. The compilation is ok:-
Win32/VC++ : cl -o HOD-ms05002-ani-expl HOD-ms05002-ani-expl.c
Win32/cygwin: gcc -o HOD-ms05002-ani-expl HOD-ms05002-ani-expl.c
Linux : gcc -o HOD-ms05002-ani-expl HOD-ms05002-ani-expl.c
But the next step is not understood:
C:\>HOD-ms05002-ani-expl.exe poc 7777
I see the same "poc(may be proof of concept)" in the command for linux too
$ HOD-ms05002-ani-expl poc 7777 192.168.0.30
What is the meaning of the above two commands?
I exploited the vulnerability in my XP virtual machine from Kali- metasploit and that was by XP visiting the URIPATH. But the above method is out of my grip.
Thanks
kriss332
Got the answer, I wasnt looking at the code part. poc was just an argument passed to program.