Dedicated Server Crash – Restart not possible

Dedicated Server Crash – Restart not possible | Web Hosting Talk

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  1. Dedicated Server Crash – Restart not possible

    Was the server ever crashed and could not the server be restarted? This happened to me after the update of Windows Server 2016. I had problems with the server in the last week and now my hosting company is building a new database server for me. Hopefully no data was lost. Use RAID technology.

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MySQL 5.7.25 Crash on the first query on corrupt Innodb table


Ubuntu 18.04.1 LTS
4.15.0-34 generic # 37 Ubuntu
Docker: 18.06.1-ce build e68fc7a
mysql: 5 @ sha256: e47e309f72c831cf880cc0e1990b9c5ac427016acdc71346a36c83806ca79bb4

mysql --version = Ver 14.14 Distrib 5.7.25 for Linux (x86_64) with EditLine wrapper


07:17:39 UTC - mysqld has received signal 11;
This could be because you have found an error. It is also possible that this binary file
or one of the linked libraries is damaged, improperly created,
or configured incorrectly. This error can also be caused by faulty hardware.
An attempt was made to gather some information that could help diagnose the problem.
Since this is a crash and definitely something is wrong, the information is
Capture process may fail.

key_buffer_size = 8388608
read_buffer_size = 131072
max_used_connections = 6
max_threads = 151
thread_count = 5
connection_count = 5
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size) * max_threads = 68196 kilobytes of memory
Hope that's ok; If not, reduce some variables in the equation.

Thread pointer: 0x7f9814012240
Tracing is attempted. You can use the following information to find out
where mysqld died. If you do not see any news after that, something has happened
terribly wrong ...
stack_bottom = 7f98580a4e80 thread_stack 0x40000
mysqld (my_print_stackrace + 0x2c)[0x560da4deb81c]
mysqld (handle_fatal_signal + 0x479)[0x560da4716879]
mysqld (_Z32page_cur_search_with_match_bytesPK11buf_block_tPK12dict_index_tPK8dtuple_t15page_cur_mode_tPmS9_S9_S9_P10page_cur_t + 0x167)[0x560da4eb2be7]
mysqld (_Z27btr_cur_search_to_nth_levelP12dict_index_tmPK8dtuple_t15page_cur_mode_tmP9btr_cur_tmPKcmP5mtr_t + 0x989)[0x560da4fd81a9]
mysqld (+ 0xe682d9)[0x560da4f2c2d9]
mysqld (_Z15row_search_mvccPh15page_cur_mode_tP14row_prebuilt_tmm + 0x1b9e)[0x560da4f3307e]
mysqld (_ZN11ha_innobase10index_readEPhPKhj16ha_rkey_function + 0x244)[0x560da4e2ee24]
mysqld (_ZN7handler17ha_index_read_mapEPhPKhm16ha_rkey_function + 0x30f)[0x560da476830f]
mysqld (+ 0xac68f4)[0x560da4b8a8f4]
mysqld (_Z10sub_selectP4JOINP7QEP_TABb + 0x105)[0x560da4b8dbb5]
mysqld (_ZN4JOIN4execEv + 0x370)[0x560da4b86a30]
mysqld (_Z12handle_queryP3THDP3LEXP12Query_resultyy + 0x233)[0x560da4bf5eb3]
mysqld (+ 0x61cf32)[0x560da46e0f32]
mysqld (_Z21mysql_execute_commandP3THDb + 0x460d)[0x560da4bb972d]
mysqld (_Z11mysql_parseP3THDP12Parser_state + 0x395)[0x560da4bbbff5]
mysqld (_Z16dispatch_commandP3THDPK8COM_DATA19enum_server_command + 0xfc4)[0x560da4bbd0b4]
mysqld (_Z10do_commandP3THD + 0x197)[0x560da4bbe487]
mysqld (handle_connection + 0x278)[0x560da4c7af38]
mysqld (pfs_spawn_thread + 0x1b4)[0x560da5153164]

I try to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (7f98141c3520): SELECT `id`,` state`, `param`,` cursor_row`, `cursor_column`,` can_send`, `createdAt`,` updatedAt`, `userId`,` botId` FROM `states` AS `state` WHERE` state`.`userId` = 131913 AND` state`.`botId` = 3202 LIMIT 1
Connection ID (thread ID): 863486

The manual page at contains
Information that helps you find out what is causing the crash.

May be unused but often repeated:

2019-06-12T14: 52: 32.090130Z 0 [Note] InnoDB: page_cleaner: The intended 1000ms loop took 10295ms. The settings may not be optimal. (Blush = 9 and expels = 0 during the time.)
2019-06-12T14: 53: 56.177026Z 0 [Note] InnoDB: page_cleaner: The intended 1000ms loop took 8427ms. The settings may not be optimal. (purged = 200 and expelled = 0 during the time.)
2019-06-12T15: 03: 05.055209Z 0 [Note] InnoDB: page_cleaner: The intended 1000ms loop took 6080ms. The settings may not be optimal. (purged = 3 and expelled = 0, during the time.)
2019-06-12T15: 03: 52.398646Z 0 [Note] InnoDB: page_cleaner: The intended 1000ms loop lasted 5042ms. The settings may not be optimal. (Blush = 168 and expels = 0 during the time.)

more protocols and settings

The default settings in Docker have not been changed. It works fine and queries to all unaffected tables work fine, but all queries even work CHECK TABLE on the affected table, the server crashed immediately.

I have not tried data recovery and simply deleted and restored the table from backups. However, this is the second time in two months that this happened (for different tables, but both were compared to the rest tables with more write accesses).

How can I diagnose or reduce the cause of corruption?

What I have checked so far:

  • The attached protocol is the first sign that something is going wrong. The previous log entry is 30 minutes before and has no reference. And while a crash with a corrupted table is reproducible, I have no way to reproduce the corruption, and a higher level of verbosity of the logs can not be seen on the production server under load.
  • dmesg | egrep -i & # 39; killed process & # 39; is empty, the box has 4GB of RAM and swap enabled. I do not think the tables were damaged during a write by an OOM kill.

Innodb High I / O, some parameters make MySQL crash

I have a Windows 2012 server with 16 core CPU and 64 GB RAM and 3 * 146g sas 15k that were used as database server and only have MySQL installed as part of XAMPP.

The MySQL version is 5.7.x.

I've tried a few different configurations, but if some parameters change, MySQL will not start anyway!

1) if I set innodb_dedicated_server mysql does not start

innodb_dedicated_server = true

2) if I put innodb_buffer_pool_size, innodb_buffer_pool_instances, innodb_buffer_pool_chunk_size together, mysql will not work either

innodb_buffer_pool_size = 40G
innodb_buffer_pool_instances = 40
innodb_buffer_pool_chunk_size = 1G

but when I set these configurations, mysql starts to work properly (innodb_buffer_pool_instances, innodb_buffer_pool_chunk_size are commented)

port = 3306
socket = /tmp/mysql.sock
key_buffer_size = 384M
max_connection = 5000
max_allowed_packet = 1M
table_open_cache = 512
sort_buffer_size = 2M
read_buffer_size = 2M
read_rnd_buffer_size = 8M
myisam_sort_buffer_size = 64M
thread_cache_size = 8
query_cache_size = 32M
# Try the number of CPUs * 2 for thread_concurrency
thread_concurrency = 8

max_allowed_packet = 1048576

innodb_io_capacity = 2000
innodb_read_io_threads = 64
innodb_thread_concurrency = 0
innodb_write_io_threads = 64

# innodb_buffer_pool_size = 40G
# innodb_log_file_size = 2G

#innodb_dedicated_server = true

innodb_buffer_pool_size = 20G
#innodb_buffer_pool_instances = 20
#innodb_buffer_pool_chunk_size = 1G

How can I achieve better performance ?!

gnome – Desktop crash after upgrade from 18.10 to 19.04

After the upgrade from 18.10 to 19.04 I find the desktop useless. After logging in, I notice the following:

  • The Dash-to-Dock dock on the left does not show objects except the nine-point square (Task Drawer?). If you click on it, nothing happens.
  • If you move the mouse pointer to the upper left corner, the overview will not be displayed.
  • By clicking on the top left corner, I return to the login screen.

This works for all logins I've tried:

  • gnome
  • Gnomes on Xorg
  • Ubuntu on Xorg

I assume that a configuration item or a shell extension causes this. Before upgrading, I fully updated 18.10, but I installed shell extensions through and did not think about checking for updates. (The software manager has indicated that the website with the Gnome shell extensions is not accessible.)

Does it have an advantage if I report this error before fixing it?

Finally, I will try to disable the shell extensions and the next configuration files. In the worst case I try XFCE and in the worst case Nuke and Repave.

What is the best way to report an error (considering I can not run GUI programs)?

If it does help, I've picked up a part of / var / log / syslog that might reflect the problem and dropped it at The salient line could be:

June 4 08:47:34 Karakum Gnome-Shell[6106]: Connection to xwayland interrupted

Many Thanks!

Crash – Mathematica 12 crashes when logging a duplicate series

I recently upgraded from Mathematica 10.4 to 12.0. Unfortunately, I now experience crashes with code that was stable in 10.4. The code contains extensive manipulations of the serial function with 2 variables. The offender seems to be when the logarithm of such a series is taken.

Here is an example:

log[SeriesData[p,DirectedInfinity[1],List[SeriesData[e,0,List[1,0,Rational[-3,2]]0,3,1], 0, SeriesData[e,0,List[3,0,Rational[-3,2]]0,3,1], 0, SeriesData[e,0,List[Rational[9,2]0.12]0,3,1], 0, SeriesData[e,0,List[Rational[27,2]0.63]0,3,1], 0, SeriesData[e,0,List[Rational[405,8], 0, reasonable[5499,16]]0,3,1]], 0,9,2]]

In Mathematica 10.4 this is evaluated (quickly) to another series in (1 / p) and e, while in Mathematica 12.0 it blocks for a few seconds and then crashes. Simple workarounds with "normal" in the log and subsequent inclusion of another series are not ideal because Mathematica must automatically track the jobs in question, instead of having to manually set all jobs.

virtualbox – Ubuntu Crash – Vbox

Runs Ubuntu 18.04 and has recently encountered frequent crashes and reboots.

May I have you expertly advised on the meaning of kernel.log at the moment of the last crash?

May 27 21:13:13 machinename kernel: [ 7.410578] IPv6: ADDRCONF (NETDEV_CHANGE): eno2: connection is getting ready

May 27 21:13:24 machinename kernel: [ 18.972048] snd_hda_codec_hdmi hdaudioC1D0: HDMI: invalid ELD data byte 12

May 27 21:13:25 machinename kernel: [ 19.360005] snd_hda_codec_hdmi hdaudioC1D0: HDMI: invalid ELD data byte 26

May 27 21:13:29 machinename kernel: [ 23.663962] Bluetooth: RFCOMM TTY layer initialized

May 27 21:13:29 machinename kernel: [ 23.663965] Bluetooth: RFCOMM socket layer initialized

May 27 21:13:29 machinename kernel: [ 23.663967] Bluetooth: RFCOMM version 1.11

May 27 21:13:29 machinename kernel: [ 24.156208] rfkill: Input handler disabled

May 27 21:13:42 machinename kernel: [ 36.969711] SUPR0GipMap: fGetGipCpu = 0xb

May 27 21:13:43 machinename kernel: [ 37.430565] vboxdrv: 0000000000000000 VMMR0.r0

May 27 21:13:43 machinename kernel: [ 37.524805] vboxdrv: 0000000000000000 VBoxDDR0.r0

May 27 21:13:43 machinename kernel: [ 37.550209] VBoxNetFlt: Appears on & # 39; eno2 & # 39; / 04: 92: 26: there: 22: 38 attached

May 27 21:13:43 machinename kernel: [ 37.676988] Device eno2 has entered promiscuous mode

May 27 21:13:43 machinename kernel: [ 37.682712] vboxdrv: 0000000000000000 VBoxEhciR0.r0

Thank you for your advice.

c – crash when dereferencing "char *", strings can not be compared

I worked all day figuring out a problem with my driver. The problem seems to be that when I dereference one of my strings (ProcessName, attachedName), my driver and operating system crash.

edit: I forgot to post that the char * dereference returns null or nothing to strcmp, so it crashed or seemed to have crashed. It was or was caused by a STATUS_ACCESS_VIOLATION status. I hope that helps.

I've seen everything I could find on Google about string comparison, multibyte and Unicode string encoding, and the difference between string types. Finally, I realized that the crash resulted in dereferencing the variables.

// On callback I try to compare the strings
if (Create == TRUE) {
PEPROCESS process;

if (NT_SUCCESS (PsLookupProcessByProcessId (ProcessId & Process))) {
LPSTR ProcessName = (LPSTR) PsGetProcessImageFileName (Process);
PVOID ProcessBase = PsGetProcessSectionBaseAddress (Process);
UINT64 VirtualSize = (UINT64) ((PCUCHAR) Process + 0x338);
UINT64 PeakVirtualSize = (UINT64) ((PCUCHAR) Process + 0x330);

// if (attachedName) {
// if (! strcmp (process name, appended name)) {
DbgPrintEx (0, 0, "ParentId:% i | ProcessId:% i | ProcessName:% s | ProcessBase: 0x% p | VirtualSize: 0x% X | PeakVirtualSize: 0x% X", ParentId, ProcessId, * ProcessName, ProcessBase, VirtualSize, PeakVirtualSize);

ObDereferenceObject (Process);

// The case in a switch statement that I call to find a specific process in the callback

attachedName = sent-> attach.exeName;
DbgPrintEx (0, 0, "% s", attachedName);

The expected result should be a single character or something printed from "ProcessName" dereferencing, if I remove the dereferencing, no crash will occur.

All this I found out about a debug message that touches me! Strcmp + 4C forwards. There, string1 or the first input is dereferenced.

ubuntu – Why does "Visual Studio Code" crash my Windows 10 over and over again?

I just started using Microsoft Visual Studio Code.

I have a setup terminal for using WSL Ubuntu.

Microsoft has done an excellent job in this regard. I have some extensions that work very well, like GitLens, Docker.

So here's the problem I'm facing
1. I have opened a Terminal WSL Ubuntu in VisualStudioCode.
2. I have created a Git clone of my Ansible PB repos.
3. I have just started the Ansible PB and Windows has crashed with blue screen.

I have restarted and run the Ansible Playbook, the crash is consistent.
Seems to be just some of the playbook. There were no problems using connection = paramiko.

Has anyone noticed this problem?

Rman archive backups that hang due to a datadomain issue cause the Linux system to crash

Dear S,

We see that our Linux system stops responding. During this time, we were able to tell from the server's crash dump that there were 23,000 oracle zombie processes and many oracle-free processes. In another analysis, we found that more than 12 RMAN archive backups only hung on a hardware issue on the underlying backup domain device for longer than 3-4 hours, and all were killed and someone restarted everything at once. Could someone please tell me if you have a similar problem? Backups should have been stopped during such issues, but we can be sure that hanging the backup has resulted in conflicts … Please note that the hardware problem in the Datadomain caused the Datadomain device to restart and intermittently connectivity problems.

crash – Frozen (crashed) Sublime Text 3, which runs two heavy Python scripts simultaneously

I have a pretty powerful computer. I was able to run several (3+) Python scripts for two years, each handling large amounts of data (hundreds of thousands of lines) simultaneously and without any problems with Sublime Text 3.

But I do not know what happened, and I can not remember making any changes to the Sublime Text or Python installation. When I try to run two Python scripts, the second is blurred and the screen eventually crashed blurred.

I also checked my Task Manager. CPU and memory utilization was in the range of 10 to 25% during this execution time.

How do I check and solve this problem? How do I execute several heavy Python scripts under Sublime Text 3, with no problems like before?

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