Merge remote-tracking branch 'upstream/master'

[nominatim.git] / docs / admin / Faq.md

diff --git a/docs/admin/Faq.md b/docs/admin/Faq.md
index 470e936c95f159bcaa30101a589c01f07c71a0a0..1e874c789bf5b210985a542080ecd41829590fe0 100644 (file)
--- a/docs/admin/Faq.md
+++ b/docs/admin/Faq.md
@@ -1,29 +1,10 @@
-# Running Your Own Instance
+# Troubleshooting Nominatim Installations

 
 

-### Can I import only a few countries and also keep them up to date?
+## Installation Issues

 
 

-You should use the extracts and updates from https://download.geofabrik.de.
-For the intial import, download the countries you need and merge them.
-See [OSM Help](https://help.openstreetmap.org/questions/48843/merging-two-or-more-geographical-areas-to-import-two-or-more-osm-files-in-nominatim)
-for examples how to do that. Use the resulting single osm file when
-running `setup.php`.
+### Can a stopped/killed import process be resumed?

 
 

-For updates you need to download the change files for each country
-once per day and apply them **separately** using
-
-    ./utils/update.php --import-diff <filename> --index
-    
-See [this issue](https://github.com/openstreetmap/Nominatim/issues/60#issuecomment-18679446)
-for a script that runs the updates using osmosis.
-
-### My website shows: `XML Parsing Error: XML or text declaration not at start of entity Location</code>.`
-
-Make sure there are no spaces at the beginning of your `settings/local.php` file.
-
-
-# Installation
-
-### I accidentally killed the import process after it has been running for many hours. Can it be resumed?
+"I accidentally killed the import process after it has been running for many hours. Can it be resumed?"

 
 It is possible if the import already got to the indexing stage.
 Check the last line of output that was logged before the process
 
 It is possible if the import already got to the indexing stage.
 Check the last line of output that was logged before the process


@@ -41,11 +22,12 @@ then you can resume with the following command:
 If the reported rank is 26 or higher, you can also safely add `--index-noanalyse`.
 
 
 If the reported rank is 26 or higher, you can also safely add `--index-noanalyse`.
 
 

-### When running the setup.php script I get a warning:
+### PHP "open_basedir restriction in effect" warnings
+

     `PHP Warning:  file_get_contents(): open_basedir restriction in effect.`
 
 You need to adjust the [open_basedir](http://www.php.net/manual/en/ini.core.php#ini.open-basedir) setting
     `PHP Warning:  file_get_contents(): open_basedir restriction in effect.`
 
 You need to adjust the [open_basedir](http://www.php.net/manual/en/ini.core.php#ini.open-basedir) setting

-in your PHP configuration (php.ini file). By default this setting may look like this:
+in your PHP configuration (`php.ini file`). By default this setting may look like this:

 
     open_basedir = /srv/http/:/home/:/tmp/:/usr/share/pear/
 
 
     open_basedir = /srv/http/:/home/:/tmp/:/usr/share/pear/
 


@@ -54,7 +36,9 @@ dding ";" at the beginning of the line. Don't forget to enable this setting agai
 once you are done with the PHP command line operations.
 
 
 once you are done with the PHP command line operations.
 
 

-### The Apache log contains lots of PHP warnings like this:
+### PHP timzeone warnings
+
+The Apache log may contain lots of PHP warnings like this:

     `PHP Warning:  date_default_timezone_set() function.`
 
 You should set the default time zone as instructed in the warning in
     `PHP Warning:  date_default_timezone_set() function.`
 
 You should set the default time zone as instructed in the warning in


@@ -71,28 +55,41 @@ Or
 echo "date.timezone = 'America/Denver'" > /etc/php.d/timezone.ini
 ```
 
 echo "date.timezone = 'America/Denver'" > /etc/php.d/timezone.ini
 ```
 

-### When running the import I get a version mismatch:
-    `COPY_END for place failed: ERROR: incompatible library "/opt/Nominatim/module/nominatim.so": version mismatch`
+### nominatim.so version mismatch
+
+When running the import you may get a version mismatch:
+`COPY_END for place failed: ERROR: incompatible library "/srv/Nominatim/nominatim/build/module/nominatim.so": version mismatch`

 
 pg_config seems to use bad includes sometimes when multiple versions
 of PostgreSQL are available in the system. Make sure you remove the
 
 pg_config seems to use bad includes sometimes when multiple versions
 of PostgreSQL are available in the system. Make sure you remove the

-server development libraries (`postgresql-server-dev-9.1` on Ubuntu)
+server development libraries (`postgresql-server-dev-9.5` on Ubuntu)

 and recompile (`cmake .. && make`).
 
 
 and recompile (`cmake .. && make`).
 
 

-### I see the error: `function transliteration(text) does not exist`
+### I see the error: "function transliteration(text) does not exist"

 
 Reinstall the nominatim functions with `setup.php --create--functions`
 and check for any errors, e.g. a missing `nominatim.so` file.
 
 
 Reinstall the nominatim functions with `setup.php --create--functions`
 and check for any errors, e.g. a missing `nominatim.so` file.
 

+### I see the error: "ERROR: mmap (remap) failed"
+
+This may be a simple out-of-memory error. Try reducing the memory used
+for `--osm2pgsql-cache`. Also make sure that overcommitting memory is
+allowed: `cat /proc/sys/vm/overcommit_memory` should print 0 or 1.
+
+If you are using a flatnode file, then it may also be that the underlying
+filesystem does not fully support 'mmap'. A notable candidate is virtualbox's
+vboxfs.

 
 

-### The website shows: `Could not get word tokens`
+### The website shows: "Could not get word tokens"

 
 The server cannot access your database. Add `&debug=1` to your URL
 to get the full error message.
 
 
 
 The server cannot access your database. Add `&debug=1` to your URL
 to get the full error message.
 
 

-### On CentOS the website shows `could not connect to server: No such file or directory`
+### On CentOS the website shows "Could not connect to server"
+
+`could not connect to server: No such file or directory`

 
 On CentOS v7 the PostgreSQL server is started with `systemd`.
 Check if `/usr/lib/systemd/system/httpd.service` contains a line `PrivateTmp=true`.
 
 On CentOS v7 the PostgreSQL server is started with `systemd`.
 Check if `/usr/lib/systemd/system/httpd.service` contains a line `PrivateTmp=true`.


@@ -105,22 +102,101 @@ However, you can solve this the quick and dirty way by commenting out that line
     sudo systemctl restart httpd
 
 
     sudo systemctl restart httpd
 
 

-### Setup.php fails with the message: `DB Error: extension not found`
+### "must be an array or an object that implements Countable" warning in /usr/share/pear/DB.php
+
+As reported starting PHP 7.2. This external DB library is no longer maintained and will be replaced in future Nominatim versions. In the meantime you'd have to manually change the line near 774 from
+`if (!count($dsn)) {` to  `if (!$dsn && !count($dsn))`. [More details](https://github.com/openstreetmap/Nominatim/issues/1184)
+
+
+
+
+### Website reports "DB Error: insufficient permissions"
+
+The user the webserver, e.g. Apache, runs under needs to have access to the Nominatim database. You can find the user like [this](https://serverfault.com/questions/125865/finding-out-what-user-apache-is-running-as), for default Ubuntu operating system for example it's `www-data`.
+
+1. Repeat the `createuser` step of the installation instructions.
+
+2. Give the user permission to existing tables
+
+```
+   GRANT usage ON SCHEMA public TO "www-data";
+   GRANT SELECT ON ALL TABLES IN SCHEMA public TO "www-data";
+```
+
+### Website reports "Could not load library "nominatim.so"
+
+Example error message
+
+```
+   SELECT make_standard_name('3039 E MEADOWLARK LN') [nativecode=ERROR: could not
+   load library "/srv/nominatim/Nominatim-3.1.0/build/module/nominatim.so":
+   /srv/nominatim/Nominatim-3.1.0/build/module/nominatim.so: cannot open shared
+   object file: Permission denied
+   CONTEXT: PL/pgSQL function make_standard_name(text) line 5 at assignment]
+```
+
+The Postgresql database, i.e. user postgres, needs to have access to that file.
+
+The permission need to be read & executable by everybody, e.g.
+
+```
+   -rwxr-xr-x 1 nominatim nominatim 297984 build/module/nominatim.so
+```
+
+Try `chmod a+r nominatim.so; chmod a+x nominatim.so`.
+
+When running SELinux, make sure that the
+[context is set up correctly](../appendix/Install-on-Centos-7/#adding-selinux-security-settings).
+
+### Setup.php fails with "DB Error: extension not found"

 
 Make sure you have the Postgres extensions hstore and postgis installed.
 See the installation instruction for a full list of required packages.
 
 
 Make sure you have the Postgres extensions hstore and postgis installed.
 See the installation instruction for a full list of required packages.
 

-### When running the setup.php script I get a error:
-    `Cannot redeclare getDB() (previously declared in /your/path/Nominatim/lib/db.php:4)`
+
+### Setup.php reports "Cannot redeclare getDB()"
+
+`Cannot redeclare getDB() (previously declared in /your/path/Nominatim/lib/db.php:4)`

 
 The message is a bit misleading as PHP needs to load the file `DB.php` and
 instead re-loads Nominatim's `db.php`. To solve this make sure you
 
 The message is a bit misleading as PHP needs to load the file `DB.php` and
 instead re-loads Nominatim's `db.php`. To solve this make sure you

-have the [http://pear.php.net/package/DB/ Pear module 'DB'] installed.
+have the [Pear module 'DB'](http://pear.php.net/package/DB/) installed.

 
     sudo pear install DB
 
 ### I forgot to delete the flatnodes file before starting an import.
 
 That's fine. For each import the flatnodes file get overwritten.
 
     sudo pear install DB
 
 ### I forgot to delete the flatnodes file before starting an import.
 
 That's fine. For each import the flatnodes file get overwritten.

-See https://help.openstreetmap.org/questions/52419/nominatim-flatnode-storage
+See [https://help.openstreetmap.org/questions/52419/nominatim-flatnode-storage]()

 for more information.
 for more information.

+
+
+## Running your own instance
+
+### Can I import multiple countries and keep them up to date?
+
+You should use the extracts and updates from https://download.geofabrik.de.
+For the initial import, download the countries you need and merge them.
+See [OSM Help](https://help.openstreetmap.org/questions/48843/merging-two-or-more-geographical-areas-to-import-two-or-more-osm-files-in-nominatim)
+for examples how to do that. Use the resulting single osm file when
+running `setup.php`.
+
+For updates you need to download the change files for each country
+once per day and apply them **separately** using
+
+    ./utils/update.php --import-diff <filename> --index
+    
+See [this issue](https://github.com/openstreetmap/Nominatim/issues/60#issuecomment-18679446)
+for a script that runs the updates using osmosis.
+
+### Can I import negative OSM ids into Nominatim?
+
+See [this question of Stackoverflow](https://help.openstreetmap.org/questions/64662/nominatim-flatnode-with-negative-id).
+
+### Missing XML or text declaration
+
+The website might show: `XML Parsing Error: XML or text declaration not at start of entity Location.`
+
+Make sure there are no spaces at the beginning of your `settings/local.php` file.
+
+