While tracker is indexing, I can obtain search results from the "super" key menu or using tracker search, e.g. "tracker search Magnetic". After a few minutes, this stops working and further searches yield no results. tracker status reports:
Currently indexed: 2 files, 0 folders
Remaining space on database partition: 729.7 GB (82.65%)
All data miners are idle, indexing complete
To investigate, I ran:
tracker daemon --set-log-verbosity debug
tracker daemon --terminate
tracker reset --hard
tracker daemon --start
This reproduces the issue.
The system log then contains many entries like the following (this is the first):
May 23 11:35:30 Minmus tracker-store[22586]: Preparing query: 'SELECT "v_nfo_manufacturer" AS "nfo_manufacturer" FROM (SELECT "nfo:Equipment1"."nfo:manufacturer" AS "v_nfo_manufacturer" FROM "nfo:Equipment" AS "nfo:Equipment1" WHERE "v_nfo_manufacturer" IS NOT NULL AND "nfo:Equipment1"."ID" = COALESCE ((SELECT ID FROM Resource WHERE Uri = ?1 ), 0) AND "nfo:Equipment1"."nfo:manufacturer:graph" = COALESCE ((SELECT ID FROM Resource WHERE Uri = ?2 ), 0) )'
May 23 11:35:30 Minmus tracker-store[22586]: Preparing query: 'ROLLBACK'
May 23 11:35:30 Minmus tracker-store[22586]: Preparing query: 'PRAGMA cache_size = 250'
May 23 11:35:30 Minmus tracker-store[22586]: ---> [1|tracker-extract|21687] Success, no error given
May 23 11:35:30 Minmus tracker-extract[21687]: Tracker.Sparql.Backend.query(): 'SELECT COALESCE (nie:url (?u), ?u) { ?u a rdfs:Resource. FILTER (tracker:id (?u) = 120987)}'
May 23 11:35:30 Minmus tracker-extract[21687]: Preparing query: 'SELECT COALESCE ((SELECT "nie:url" FROM "nie:DataObject" WHERE ID = "v_u" ) , (SELECT Uri FROM Resource WHERE ID = "v_u" ) ) FROM (SELECT * FROM (SELECT "rdfs:Resource1"."ID" AS "v_u" FROM "rdfs:Resource" AS "rdfs:Resource1" ) WHERE ("v_u" = ?1 ) ) 'May 23 11:35:30 Minmus tracker-extract[21687]: --8<------------------------------
May 23 11:35:30 Minmus tracker-extract[21687]: The information relevant for a bug report is between the dotted lines
May 23 11:35:30 Minmus tracker-extract[21687]: Could not insert metadata for item "file:///home/merlin/Pictures/Places/Egypt_Jan09/040109_PyramidsSphinx/DSC00994.JPG": Subject `urn:uuid:6b7dd0fd-6a9c-42d9-b308-18c60d0043fb' is not in domain `nie:DataObject' of property `nie:dataSource'
May 23 11:35:30 Minmus tracker-extract[21687]: If the error above is recurrent for the same item/ID, consider running "tracker-extract" in the terminal with the TRACKER_VERBOSITY=3 environment variable, and filing a bug with the additional information
May 23 11:35:30 Minmus tracker-extract[21687]: Sparql was:
DELETE WHERE {
GRAPH <urn:uuid:472ed0cc-40ff-4e37-9c0c-062d78656540> {
<urn:uuid:6b7dd0fd-6a9c-42d9-b308-18c60d0043fb> nmm:fnumber ?nmm_fnumber } };
DELETE WHERE {
GRAPH <urn:uuid:472ed0cc-40ff-4e37-9c0c-062d78656540> {
<urn:uuid:6b7dd0fd-6a9c-42d9-b308-18c60d0043fb> nfo:orientation ?nfo_orientation } };
DELETE WHERE {
GRAPH <urn:uuid:472ed0cc-40ff-4e37-9c0c-062d78656540> {
<urn:uuid:6b7dd0fd-6a9c-42d9-b308-18c60d0043fb> nfo:width ?nfo_width } };
DELETE WHERE {
GRAPH <urn:uuid:472ed0cc-40ff-4e37-9c0c-062d78656540> {
<urn:uuid:6b7dd0fd-6a9c-42d9-b308-18c60d0043fb> nfo:verticalResolution ?nfo_verticalResolution } };
DELETE WHERE {
GRAPH <urn:uuid:472ed0cc-40ff-4e37-9c0c-062d78656540> {
<urn:uuid:6b7dd0fd-6a9c-42d9-b308-18c60d0043fb> nmm:dlnaProfile ?nmm_dlnaProfile } };
DELETE WHERE {
GRAPH <urn:uuid:472ed0cc-40ff-4e37-9c0c-062d78656540> {
<urn:uuid:6b7dd0fd-6a9c-42d9-b308-18c60d0043fb> nmm:exposureTime ?nmm_exposureTime } };
DELETE WHERE {
GRAPH <urn:uuid:472ed0cc-40ff-4e37-9c0c-062d78656540> {
<urn:uuid:6b7dd0fd-6a9c-42d9-b308-18c60d0043fb> nmm:dlnaMime ?nmm_dlnaMime } };
DELETE WHERE {
GRAPH <urn:uuid:472ed0cc-40ff-4e37-9c0c-062d78656540> {
<urn:uuid:6b7dd0fd-6a9c-42d9-b308-18c60d0043fb> nmm:whiteBalance ?nmm_whiteBalance } };
DELETE WHERE {
GRAPH <urn:uuid:472ed0cc-40ff-4e37-9c0c-062d78656540> {
<urn:uuid:6b7dd0fd-6a9c-42d9-b308-18c60d0043fb> nmm:isoSpeed ?nmm_isoSpeed } };
DELETE WHERE {
GRAPH <urn:uuid:472ed0cc-40ff-4e37-9c0c-062d78656540> {
<urn:uuid:6b7dd0fd-6a9c-42d9-b308-18c60d0043fb> nie:contentCreated ?nie_contentCreated } };
DELETE WHERE {
GRAPH <urn:uuid:472ed0cc-40ff-4e37-9c0c-062d78656540> {
<urn:uuid:6b7dd0fd-6a9c-42d9-b308-18c60d0043fb> nfo:equipment ?nfo_equipment } };
DELETE WHERE {
GRAPH <urn:uuid:472ed0cc-40ff-4e37-9c0c-062d78656540> {
<urn:uuid:6b7dd0fd-6a9c-42d9-b308-18c60d0043fb> nmm:flash ?nmm_flash } };
DELETE WHERE {
GRAPH <urn:uuid:472ed0cc-40ff-4e37-9c0c-062d78656540> {
<urn:uuid:6b7dd0fd-6a9c-42d9-b308-18c60d0043fb> nmm:meteringMode ?nmm_meteringMode } };
DELETE WHERE {
GRAPH <urn:uuid:472ed0cc-40ff-4e37-9c0c-062d78656540> {
<urn:uuid:6b7dd0fd-6a9c-42d9-b308-18c60d0043fb> nmm:focalLength ?nmm_focalLength } };
DELETE WHERE {
GRAPH <urn:uuid:472ed0cc-40ff-4e37-9c0c-062d78656540> {
<urn:uuid:6b7dd0fd-6a9c-42d9-b308-18c60d0043fb> nfo:horizontalResolution ?nfo_horizontalResolution } };
DELETE WHERE {
GRAPH <urn:uuid:472ed0cc-40ff-4e37-9c0c-062d78656540> {
<urn:uuid:6b7dd0fd-6a9c-42d9-b308-18c60d0043fb> nfo:height ?nfo_height } };
DELETE WHERE {
GRAPH <urn:uuid:472ed0cc-40ff-4e37-9c0c-062d78656540> {
<urn:equipment:SONY:DSC-H2:> nfo:model ?nfo_model } };
DELETE WHERE {
GRAPH <urn:uuid:472ed0cc-40ff-4e37-9c0c-062d78656540> {
<urn:equipment:SONY:DSC-H2:> rdf:type ?rdf_type } };
DELETE WHERE {
GRAPH <urn:uuid:472ed0cc-40ff-4e37-9c0c-062d78656540> {
<urn:equipment:SONY:DSC-H2:> nfo:manufacturer ?nfo_manufacturer } };
INSERT DATA {
GRAPH <urn:uuid:472ed0cc-40ff-4e37-9c0c-062d78656540> {
<urn:equipment:SONY:DSC-H2:> a nfo:Equipment ;
nfo:model "DSC-H2" ;
nfo:manufacturer "SONY" .
<urn:uuid:6b7dd0fd-6a9c-42d9-b308-18c60d0043fb> a nfo:Image , nmm:Photo ;
nmm:fnumber 4.5 ;
nfo:orientation nfo:orientation-top ;
nfo:width 2816 ;
nfo:verticalResolution 72 ;
nmm:dlnaProfile "JPEG_LRG" ;
nie:dataSource <http://www.tracker-project.org/ontologies/tracker#extractor-data-source> ;
nmm:exposureTime 0.001 ;
nmm:dlnaMime "image/jpeg" ;
nmm:whiteBalance nmm:white-balance-auto ;
nmm:isoSpeed 80 ;
nie:contentCreated "2009-01-04T10:32:52+0000" ;
nfo:equipment <urn:equipment:SONY:DSC-H2:> ;
nmm:flash nmm:flash-off ;
nmm:meteringMode nmm:metering-mode-pattern ;
nmm:focalLength 21.100000000000001 ;
nfo:horizontalResolution 72 ;
nfo:height 2112 .
}
};
May 23 11:35:30 Minmus tracker-extract[21687]: NOTE: The information above may contain data you consider sensitive. Feel free to edit it out, but please keep it as unmodified as you possibly can.
May 23 11:35:30 Minmus tracker-extract[21687]: ------------------------------>8--
Timing is at least roughly consistent with the loss of tracker results.
tracker --version gives:
Tracker 2.3.6
~/.cache/tracker contains a reasonably sized database (4.5 MB).
lsb_release -rd:
Description: Ubuntu 21.04
Release: 21.04
apt-cache policy tracker gives:
tracker:
Installed: 2.3.6-2
Candidate: 2.3.6-2
Version table:
*** 2.3.6-2 500
500 http://gb.archive.ubuntu.com/ubuntu hirsute/main amd64 Packages
100 /var/lib/dpkg/status
