Re: [Rpm-maint] [rpm-software-management/rpm] Rpm query causes corruption in the file-backed mmaped bdb regions (#232)
In the process of testing dcrpm, when I execute the command line lsof - F p /var/lib/rpm/.dbenv.lock, lsof displays the PIDs of all processes, including 1, instead of only displaying the PIDs of the .dbenv.lock file; It may have been generated after I installed typing (Python module) independently. Of course, it is not necessarily repeated. Therefore, I am afraid that dcrpm will execute lsof-f P /var/lib/rpm/.dbenv.lock to get the wrong PIDs and kill them all. -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/rpm-software-management/rpm/issues/232#issuecomment-557400253___ Rpm-maint mailing list Rpm-maint@lists.rpm.org http://lists.rpm.org/mailman/listinfo/rpm-maint
Re: [Rpm-maint] [rpm-software-management/rpm] Rpm query causes corruption in the file-backed mmaped bdb regions (#232)
@jaymzh I see that dcrpm used typing(begin python-3.5 as a new feature added) , but my project is running on centos 7.5 1804 and using the python 2.7.5 version, Is typing(dcrpm) compatible with Python 2.7.5? -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/rpm-software-management/rpm/issues/232#issuecomment-557397334___ Rpm-maint mailing list Rpm-maint@lists.rpm.org http://lists.rpm.org/mailman/listinfo/rpm-maint
Re: [Rpm-maint] [rpm-software-management/rpm] Rpm query causes corruption in the file-backed mmaped bdb regions (#232)
Can not avoid it? -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/rpm-software-management/rpm/issues/232#issuecomment-557374397___ Rpm-maint mailing list Rpm-maint@lists.rpm.org http://lists.rpm.org/mailman/listinfo/rpm-maint
Re: [Rpm-maint] [rpm-software-management/rpm] Rpm query causes corruption in the file-backed mmaped bdb regions (#232)
@jaymzh Yes, the processes running as root account. `the memmap() the DB read-write, and write it back out when they are done... hence if then something changes at the same time, one of those process can write back old pages.` `# ls -lthra /var/lib/rpm total 70M -rw-r--r--. 1 root root0 Oct 23 18:04 .dbenv.lock -rw-r--r--. 1 root root0 Oct 23 18:04 .rpm.lock -rw-r--r--. 1 root root 8.0K Nov 21 11:03 Triggername drwxr-xr-x. 52 root root 4.0K Nov 21 11:04 .. -rw-r--r--. 1 root root 8.0K Nov 21 11:04 Conflictname -rw-r--r--. 1 root root 60M Nov 21 16:46 Packages -rw-r--r--. 1 root root 48K Nov 21 16:46 Name -rw-r--r--. 1 root root 4.2M Nov 21 16:46 Basenames -rw-r--r--. 1 root root 28K Nov 21 16:46 Group -rw-r--r--. 1 root root 256K Nov 21 16:46 Requirename -rw-r--r--. 1 root root 1.9M Nov 21 16:46 Providename -rw-r--r--. 1 root root 24K Nov 21 16:46 Obsoletename -rw-r--r--. 1 root root 2.1M Nov 21 16:46 Dirnames -rw-r--r--. 1 root root 20K Nov 21 16:46 Installtid -rw-r--r--. 1 root root 44K Nov 21 16:46 Sigmd5 -rw-r--r--. 1 root root 76K Nov 21 16:46 Sha1header drwxr-xr-x. 2 root root 4.0K Nov 21 17:21 . -rw-r--r--. 1 root root 344K Nov 22 11:30 __db.001 -rw-r--r--. 1 root root 188K Nov 22 11:30 __db.002 -rw-r--r--. 1 root root 1.3M Nov 22 11:30 __db.003` the /var/lib/rpm/.dbenv.lock and /var/lib/rpm/.rpm.lock can not protect the multi processes serial execution?? I don't know much about database. `>>> the memmap() the DB read-write, and write it back out when they are done... hence if then something changes at the same time, one of those process can write back old pages.` It indicate that the BDB use memmap(), and the multi proccesses rpm -q software.xxx, then changed the memory page, lead to old page write back. -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/rpm-software-management/rpm/issues/232#issuecomment-557374263___ Rpm-maint mailing list Rpm-maint@lists.rpm.org http://lists.rpm.org/mailman/listinfo/rpm-maint
Re: [Rpm-maint] [rpm-software-management/rpm] Rpm query causes corruption in the file-backed mmaped bdb regions (#232)
Recently, I have encountered similar problems in my CentOS 7 environment. `[root@controller-3 ~]# uname -a Linux controller-3 3.10.0-862.el7.x86_64 #1 SMP Fri Apr 20 16:44:24 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux [root@controller-3 ~]# cat /etc/redhat-release CentOS Linux release 7.5.1804 (Core) [root@controller-3 ~]# rpm -q rpm rpm-4.11.3-32.el7.x86_64 [root@controller-3 ~]# rpm -q libdb libdb-5.3.21-24.el7.x86_64` But I can't reproduce it! This is the context of the problem at the sceneļ¼ 1. There are 8 processes running concurrently exec rpm -q software.xxx; 2. Each process generates 8 rpm -q software.xxx in 1 minute; 3. It's been running for half a year; 4. Millions of rpm -q software.xxx processes have been generated on CentOS 7; 5. memory exhaustion; 6. after recovery rpmdb (/var/lib/rpm), OS recovery; I really want to know the root cause of this problem!!! Can you tell me? Thank you very much! -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/rpm-software-management/rpm/issues/232#issuecomment-557007863___ Rpm-maint mailing list Rpm-maint@lists.rpm.org http://lists.rpm.org/mailman/listinfo/rpm-maint
