Since few days I've got the following error message in my Server error log :
www.xxx.com [client XXX.XXX.XXX.XXX] rdbmmap (21): rdbm_fetch failed (1)
Although the site is loading right. I would like to know about this error. Can't find anything around. Does anybody know about this?
Server configuration :
Server-Info: Apache/2.2.31 (Unix)
PHP-Version: 7.1.8
WordPress: 4.8.1
MySQL-Version: 5.6.37
Thanks in advance.
Please have a look at this: Map Reduce & RDBMS
RDBMS - stands for Remote database management system,
Client- is the browser,oder crawler bot ,that send the Request.
Fetch Failed- means, the system could fetch the request to the database.
Related
My centos server is running web applications in LAMP stack. A couple of days back, the server was not responding for about 10 mins and I got http response failure alert from my monitoring tool. When I checked the httpd error log I found a huge log entry (~12000 lines) related to sendmail.
14585 sendmail: fatal: open /etc/postfix/main.cf: Permission denied
The server ran out of memory and not responding.
14534 [Fri Aug 19 22:14:52.597047 2016] [mpm_prefork:error] [pid 26641] (12)Cannot allocate memory: AH00159: fork: Unable to fork new process
14586 /usr/sbin/sendmail: error while loading shared libraries: /lib64/librt.so.1: cannot allocate version reference table: Cannot allocate memory
We are not using sendmail in any of our application. How can I stop this attack in future?
Thank you in advance!
Sorry I have no comment facilities; it looks like one of your website pages is vulnarable for code injection, finding out where and what page may be a huge job. Focus on input (forms) variables. Always sanitize input variables before using them! P.s. php uses "sendmail", even if you use Postfix, it will use a sendmail binary to send mail and the sendmail binary will redirect it to Postfix. If your forms work well and the 12k error log lines come out of the blue, then I would think someone is trying to inject code through your website (happens all the time by the way).
I'm using Apache + Passenger on my Linode server, with a Postgresql-9.4 database. Every so often, I get the following error, but it is unpredictable and rights itself a few minutes later with no actions taken, so it is extremely hard to debug:
Internal server error
Phusion Passenger has listed more information about the error below.
An error occurred while starting the web application. It sent an unknown response type "".
Has anyone else run into an error like this, or know what it could imply?
Firstly go through this question, as it might solve your problem:
Passenger: internal server error
There are possible causes of problems listed here:
https://github.com/phusion/passenger/wiki/Debugging-application-startup-problems
Request entity too large
The requested resource
/some/url/path/on/server
does not allow request data with GET requests, or the amount of data provided in the request exceeds the capacity limit.
I get a corresponding error in my mod_jk.log file which is below.
[Mon Oct 10 20:36:11 2011] [9834:0] [error] ajp_marshal_into_msgb::jk_ajp_common
.c (415): failed appending the header value
I have a web farm running tomcat5, fronted by apache1.3 using the mod_jk connector. I started getting this error today on all the servers although no code changes were made today. The error seems to popup randomly. The same request doesn't always generate the error.
Can anyone explain the cause and why it would be random? I have seen recommendations to increase max_packet_size in server.xml. I want to understand the problem and the impact of the change before making it.
Below it is some information about my problem.
Our Apache2.2 is on windows 2008 server.
Basically the problem is user fails to upload file which is bigger than 100k to our server.
The error in Apache log is: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. : Error reading request entity data, referer: ......
There were a few times (not always) I could upload larger files(100k-800k, failed for 20m) in Chrome. In FF4 it always fails for uploading file over 100k. In IE8 it is similar to FF4.
It seems that it fails to get request from client, then I reset TimeOut in Apache setting to default value(300) which did not help at all.
I do not have the RequestLimitBody option set up and I am not using PHP. Anyone saw the similar error before? Now I am not sure what I can try next. Any advise would be appreciated!
Edit:
I just tried to use remote desk to upload files on the server and it worked fine. First thought was about the firewall which however is off all the time, Http Proxy is applied though.
Are there cases where the Apache2 HTTP Server responds with an internal server error (Response code 500), yet does NOT write an entry into the server's error log file?
I experience such a case and have no idea what's going on. I already checked that the server generally logs errors by requesting a badly formed php script.
Mismatching versions of php and php-mssql caused this.