1 # Troubleshooting Nominatim Installations
5 ### Can a stopped/killed import process be resumed?
7 "I accidentally killed the import process after it has been running for many hours. Can it be resumed?"
9 It is possible if the import already got to the indexing stage.
10 Check the last line of output that was logged before the process
11 was killed. If it looks like this:
14 Done 844 in 13 @ 64.923080 per second - Rank 26 ETA (seconds): 7.886255
16 then you can resume with the following command:
19 nominatim import --continue indexing
22 If the reported rank is 26 or higher, you can also safely add `--index-noanalyse`.
25 ### PostgreSQL crashed "invalid page in block"
27 Usually serious problem, can be a hardware issue, not all data written to disc
28 for example. Check PostgreSQL log file and search PostgreSQL issues/mailing
31 If it happened during index creation you can try rerunning the step with
34 nominatim import --continue indexing
37 Otherwise it's best to start the full setup from the beginning.
41 ### nominatim.so version mismatch
43 When running the import you may get a version mismatch:
44 `COPY_END for place failed: ERROR: incompatible library "/srv/Nominatim/nominatim/build/module/nominatim.so": version mismatch`
46 pg_config seems to use bad includes sometimes when multiple versions
47 of PostgreSQL are available in the system. Make sure you remove the
48 server development libraries (`postgresql-server-dev-13` on Ubuntu)
49 and recompile (`cmake .. && make`).
52 ### I see the error "ERROR: permission denied for language c"
54 `nominatim.so`, written in C, is required to be installed on the database
55 server. Some managed database (cloud) services like Amazon RDS do not allow
56 this. There is currently no work-around other than installing a database
57 on a non-managed machine.
60 ### I see the error: "function transliteration(text) does not exist"
62 Reinstall the nominatim functions with `nominatim refresh --functions`
63 and check for any errors, e.g. a missing `nominatim.so` file.
65 ### I see the error: "ERROR: mmap (remap) failed"
67 This may be a simple out-of-memory error. Try reducing the memory used
68 for `--osm2pgsql-cache`. Also make sure that overcommitting memory is
69 allowed: `cat /proc/sys/vm/overcommit_memory` should print 0 or 1.
71 If you are using a flatnode file, then it may also be that the underlying
72 filesystem does not fully support 'mmap'. A notable candidate is virtualbox's
75 ### nominatim UPDATE failed: ERROR: buffer 179261 is not owned by resource owner Portal
77 Several users [reported this](https://github.com/openstreetmap/Nominatim/issues/1168)
78 during the initial import of the database. It's
79 something PostgreSQL internal Nominatim doesn't control. And PostgreSQL forums
80 suggest it's threading related but definitely some kind of crash of a process.
81 Users reported either rebooting the server, different hardware or just trying
82 the import again worked.
84 ### The website shows: "Could not get word tokens"
86 The server cannot access your database. Add `&debug=1` to your URL
87 to get the full error message.
90 ### Website reports "DB Error: insufficient permissions"
92 The user the webserver, e.g. Apache, runs under needs to have access to the
93 Nominatim database. You can find the user like
94 [this](https://serverfault.com/questions/125865/finding-out-what-user-apache-is-running-as),
95 for default Ubuntu operating system for example it's `www-data`.
97 1. Repeat the `createuser` step of the installation instructions.
99 2. Give the user permission to existing tables
102 GRANT usage ON SCHEMA public TO "www-data";
103 GRANT SELECT ON ALL TABLES IN SCHEMA public TO "www-data";
106 ### Website reports "Could not load library "nominatim.so"
108 Example error message
111 SELECT make_standard_name('3039 E MEADOWLARK LN') [nativecode=ERROR: could not
112 load library "/srv/nominatim/Nominatim-3.1.0/build/module/nominatim.so":
113 /srv/nominatim/Nominatim-3.1.0/build/module/nominatim.so: cannot open shared
114 object file: Permission denied
115 CONTEXT: PL/pgSQL function make_standard_name(text) line 5 at assignment]
118 The PostgreSQL database, i.e. user `postgres`, needs to have access to that file.
120 The permission need to be read & executable by everybody, but not writeable
124 -rwxr-xr-x 1 nominatim nominatim 297984 build/module/nominatim.so
127 Try `chmod a+r nominatim.so; chmod a+x nominatim.so`.
129 When you recently updated your operating system, updated PostgreSQL to
130 a new version or moved files (e.g. the build directory) you should
131 recreate `nominatim.so`. Try
136 cmake $main_Nominatim_path && make
139 ### Setup fails with "DB Error: extension not found"
141 Make sure you have the PostgreSQL extensions "hstore" and "postgis" installed.
142 See the installation instructions for a full list of required packages.
145 ### UnicodeEncodeError: 'ascii' codec can't encode character
147 Make sure that the operating system's locale is UTF-8. With some prebuilt
148 images (e.g. LXC containers from Proxmox, see
149 [discussion](https://github.com/osm-search/Nominatim/discussions/2343)) or
150 images that optimize for size it might be missing.
152 On Ubuntu you can check the locale is installed:
155 grep UTF-8 /etc/default/locale
161 dpkg-reconfigure locales
164 ### I forgot to delete the flatnodes file before starting an import.
166 That's fine. For each import the flatnodes file get overwritten.
167 See [https://help.openstreetmap.org/questions/52419/nominatim-flatnode-storage](https://help.openstreetmap.org/questions/52419/nominatim-flatnode-storage)
168 for more information.
171 ## Running your own instance
173 ### Can I import negative OSM ids into Nominatim?
175 See [this question of Stackoverflow](https://help.openstreetmap.org/questions/64662/nominatim-flatnode-with-negative-id).