Fixing Gutenberg error “The editor has encountered an unexpected error”
After update to WP 5, I’ve faced with next issue, I’ve couldn’t add new post or edit existed. Looks like error happens because of misconfigured nginx and when new ‘Gutenberg’ editor is active (which is true by default for wordpress 5.0 and above).
Earlier I had nginx location / configured in next manner:
location / {
try_files $uri $uri/ /index.php?$args;
}Same configuration can be found on wordpress codex page:
And on nginx recipe page:
The issue caused by question sign in try_files directive, when $args is empty, index.php is called like this: “/index.php?”. Solution is simple:
$is_args
“?” if a request line has arguments, or an empty string otherwise
After I changed location / block like this:
location / {
try_files $uri $uri/ /index.php$is_args$args;
}The problem is gone.
Posted in Linux related, Web related | Tags: linux, nginx, wordpress | No Comments
Unravel unknown thermistor
Recently I made mistake and made PCB for arduino module where connect temperature sensor to A7 PIN. I’ve envisaged that sensor could be analog (diode) or digital. Soon I’ve learned that diode doesn’t provide enough accuracy even for ±5℃ (2mV/℃) and surprise-surprise A7 pin is only analog input so I can’t use DS18B.
I had haven’t any other temp sensors, fortunately I’ve remembered that I have broken battery controller from laptop and it should have some sort of temp sensor, here it is: 
I’ve poked it with multimeter few times to be sure that it isn’t semiconductor sensor, but NTC with near 10K Ohm resistance at 25℃. I’ve decided to use it, but don’t know how much Ohm/℃ it has. I’ve planned to use linear approximation to convert resistance to temp, so i measure few points and here what i got:
Here is ADC value on X-Axis and temperature on Y-Axis. Pure perfect, i could use it with one pair of a and b coefficients in temperature range which i want.
Posted in Hardware | Tags: hardware | No Comments
Dirty hack to add values mappings in Zabbix
“I’ll be brief.” ©
Here is two things about script published in ZBXNEXT-1424, first it can help you to automate creation of large mappings (and it’s cool), second it will broke your DB (not so cool, maaan).
When you will try to add mapping in broken DB you will see something like this:
The “Error in query [INSERT INTO valuemaps (name,valuemapid) VALUES (‘Test mapping’,’50’)] [Duplicate entry ’50’ for key ‘PRIMARY’]” mean, that in table valuemaps you already have entry with valuemapid = 50. Why it happened i tell later after we fix DB.
To fix DB, you need to update few entries in table ‘idx‘, first update nextid where table_name = valuemaps:
mysql> update ids set nextid = (select max(valuemaps.valuemapid)+1 from valuemaps) where table_name = 'valuemaps'; Query OK, 1 row affected (0.22 sec) Rows matched: 1 Changed: 1 Warnings: 0 |
Second update nextid for mappings:
mysql> update ids set nextid = (select max(mappings.mappingid)+1 from mappings) where table_name = 'mappings'; Query OK, 1 row affected (0.22 sec) Rows matched: 1 Changed: 1 Warnings: 0 |
Here it is!
This happened because script does not update table idx. May be it’s ok for zabbix 2.0 that mentioned in feature request, but it’s broke database for zabbix 2.2 and newer. Unfortunately zabbix prior version 3.0 does not have API or ability to import mappings , so that script still useful.
Here is fixed script, i hope author will not offended at me:
#!/usr/bin/perl use warnings; use strict; my $usage = "$0 valueMapName number newvalue [number2 newvalue2 [...]] E.g.: $0 'Alarm Status' 1 ok 2 unknown 3 stale 4 problem $0 'Aliveness' 0 dead 1 alive "; my $valueMapName = shift() || die "No new valuemap name"; my @mapList = @ARGV; die "No mappings given. Usage: $usage\n" if scalar(@mapList) == 0; my $isEvenNumber = scalar(@mapList) % 2 == 0; die "Must give mapping->value pairs. Usage: $usage\n" if not $isEvenNumber; my %mappings = @mapList; my $newValueMapId = int(qx/mysql -N -s -e 'select nextid from zabbix.ids where field_name = "valuemapid"'/) || die("Can't fetch max valuemapid\nUsage: $usage\n"); $newValueMapId++; my $newMappingId = int(qx/mysql -N -s -e 'select nextid from zabbix.ids where field_name = "mappingid"'/) || die("Can't fetch max mappingid\nUsage: $usage\n"); $newMappingId++; eval { my $valueMapCmd = qq/mysql -e "insert into zabbix.valuemaps (valuemapid, name) values ('$newValueMapId', '$valueMapName');"/; print "$valueMapCmd\n"; system $valueMapCmd; eval { for my $from (keys %mappings) { my $to = $mappings{$from}; my $mappingCmd= qq/mysql -e "insert into zabbix.mappings (mappingid, valuemapid, value, newvalue) values ('$newMappingId', '$newValueMapId', '$from', '$to');"/; print "$mappingCmd\n"; system $mappingCmd; $newMappingId++; } }; if ($@) { die "something went wrong inserting into mappings $@"; } }; if ($@) { die "something went wrong inserting into valuemaps $@"; } my $valueMapUpdCmd = qq/mysql -e 'update zabbix.ids set nextid = "$newValueMapId" where field_name = "valuemapid";'/; print "$valueMapUpdCmd\n"; system $valueMapUpdCmd; $newMappingId--; my $mappingUpdCmd = qq/mysql -e 'update zabbix.ids set nextid = "$newMappingId" where field_name = "mappingid";'/; print "$mappingUpdCmd\n"; system $mappingUpdCmd; |
Posted in Linux related | Tags: linux, monitoring, mysql, repair, zabbix | No Comments
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