I experienced some syncing problems with an IMAP account where new messages did not arrive even by manual sync and tried restarting akonadi. The initial problem did not happen again, but the unified mailbox does not contain the stated IMAP folder and exception is thrown apparently in ItemQueryHelper::scopeToQuery#L156 anton@anton-Inspiron-7720 ~ % akonadictl start Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString) anton@anton-Inspiron-7720 ~ % org.kde.pim.akonadiserver: Starting up the Akonadi Server... akonadi.collectionattributetable OK akonadi.collectionmimetyperelation OK akonadi.collectionpimitemrelation OK akonadi.collectiontable OK akonadi.flagtable OK akonadi.mimetypetable OK akonadi.parttable OK akonadi.parttypetable OK akonadi.pimitemflagrelation OK akonadi.pimitemtable OK akonadi.pimitemtagrelation OK akonadi.relationtable OK akonadi.relationtypetable OK akonadi.resourcetable OK akonadi.schemaversiontable OK akonadi.tagattributetable OK akonadi.tagremoteidresourcerelationtable OK akonadi.tagtable OK akonadi.tagtypetable OK org.kde.pim.akonadiserver: Running DB initializer org.kde.pim.akonadiserver: DB initializer done Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString) org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de0005430) ) org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de000e020) ) org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de001afd0) ) Attribute Qt::AA_ShareOpenGLContexts must be set before QCoreApplication is created. org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de0005430) identified as "ETMCalendarMonitor - 94330149824128" org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de0037fd0) ) org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de0040c20) ) Attribute Qt::AA_ShareOpenGLContexts must be set before QCoreApplication is created. Attribute Qt::AA_ShareOpenGLContexts must be set before QCoreApplication is created. org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de0042cf0) ) org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de004b1f0) ) org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de00549b0) ) org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de005d9c0) ) org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de0066a40) ) org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de001afd0) identified as "AgentBaseChangeRecorder - 93837214662848" org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de0078cd0) ) org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de0002f20) ) Attribute Qt::AA_ShareOpenGLContexts must be set before QCoreApplication is created. org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de0078cd0) identified as "AgentBaseChangeRecorder - 93893588801680" org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de0002f20) identified as "akonadi_birthdays_resource - 93893588875536" org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de00a4b60) ) org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de00a4b60) identified as "AgentBaseChangeRecorder - 94876514323360" org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de00ad840) ) Attribute Qt::AA_ShareOpenGLContexts must be set before QCoreApplication is created. org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de00b6a10) ) org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de00ad840) identified as "AgentBaseChangeRecorder - 94300064621312" org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de00b6a10) identified as "AgentBaseChangeRecorder - 94437206506752" Attribute Qt::AA_ShareOpenGLContexts must be set before QCoreApplication is created. org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de00d9c00) ) org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de00d9c00) identified as "AgentBaseChangeRecorder - 94471288401872" org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de0040c20) identified as "AgentBaseChangeRecorder - 94780989184496" QDBusConnection: name 'org.freedesktop.Akonadi.Control' had owner '' but we thought it was ':1.226' org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de00f3ef0) ) org.kde.pim.akonadiserver: Subscriber "" disconnected org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de00ebb50) ) org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de0037fd0) identified as "AgentBaseChangeRecorder - 94419594581856" org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de00f3ef0) identified as "AgentBaseChangeRecorder - 94330459114544" org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de000e020) identified as "AgentBaseChangeRecorder - 94096557047952" org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de005d9c0) identified as "akonadi_maildispatcher_agent - 139668310065456" org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de0066a40) identified as "SpecialCollectionsMonitor - 94096557181552" org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de0107240) ) org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de01066a0) ) org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de0107910) ) org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de0107910) identified as "AgentBaseChangeRecorder - 94134482889360" org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de0106ad0) ) Attribute Qt::AA_ShareOpenGLContexts must be set before QCoreApplication is created. org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de004b1f0) identified as "AgentBaseChangeRecorder - 94829224076896" org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de0106ad0) identified as "AgentBaseChangeRecorder - 94734703092176" org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de015c9f0) ) org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de01653b0) ) org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de016dd30) ) org.kde.pim.akonadiserver: Subscriber "" disconnected org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de0176d00) ) org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de018cb40) ) org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de015c9f0) identified as "AgentBaseChangeRecorder - 94198740202576" org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de0042cf0) identified as "AgentBaseChangeRecorder - 94369722307152" org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de0107240) identified as "KNotes Session - 94369722349616" org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de018aa40) ) org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de018b050) ) org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de00549b0) identified as "AgentBaseChangeRecorder - 94889941805600" org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de018cb40) identified as "Archive Mail Kernel ETM - 94889941915152" org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de018b050) identified as "ArchiveMailCollectionMonitor - 94889941915520" Attribute Qt::AA_ShareOpenGLContexts must be set before QCoreApplication is created. Attribute Qt::AA_ShareOpenGLContexts must be set before QCoreApplication is created. org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de01cf330) ) org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de01d0350) ) org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de01066a0) identified as "AgentBaseChangeRecorder - 94607786387680" org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de016dd30) identified as "AgentBaseChangeRecorder - 94001098125056" org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de01653b0) identified as "AgentBaseChangeRecorder - 94467800454448" org.kde.pim.akonadiserver: Subscriber "" disconnected org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de01f3190) ) org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de01f3190) ) org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de0203a00) ) org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de01e1930) ) org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de018aa40) identified as "AgentBaseChangeRecorder - 94119860019312" org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de01f3190) identified as "MailFilter Kernel ETM - 94119860151552" org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de0203a00) identified as "MailFilterCollectionMonitor - 94119860379280" org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de01e1930) identified as "MailFilterItemMonitor - 94119860652000" org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de0239220) ) org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de0239220) identified as "SpecialCollectionsMonitor - 140476569286112" org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de024ab10) ) org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de01d0350) identified as "AgentBaseChangeRecorder - 93844459026752" org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de024ab10) identified as "UnifiedMailboxChangeRecorder - 93844459015776" org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de01cf330) identified as "AgentBaseChangeRecorder - 93930733863312" org.kde.pim.akonadiserver: Handler exception when handling command FetchItems on connection akonadi_unifiedmailbox_agent (0x55cf447c85d0) : Dude, WTF?!? org.kde.pim.akonadiserver: Handler exception when handling command FetchItems on connection akonadi_unifiedmailbox_agent (0x55cf447c85d0) : Dude, WTF?!? org.kde.pim.akonadiserver: Handler exception when handling command FetchItems on connection akonadi_unifiedmailbox_agent (0x55cf447c85d0) : Dude, WTF?!? org.kde.pim.akonadiserver: Subscriber "" disconnected org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de000eb80) ) org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de000eb80) ) org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de02381e0) ) org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de02058d0) ) org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de02386b0) ) org.kde.pim.akonadiserver: Subscriber "" disconnected org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de02386b0) ) org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de0238a20) ) org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de0239a30) ) org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de000eb80) identified as "KMail Kernel ETM - 94029310363232" org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de02381e0) identified as "SpecialCollectionsMonitor - 94029310895664" org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de02058d0) identified as "MessageListTagMonitor - 94029311694208" org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de02386b0) identified as "MessageViewerMonitor - 94029310987840" org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de02386b0) identified as "MessageViewerMonitor - 94029310987840" org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de0238a20) identified as "TagActionManagerMonitor - 94029313732976" org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de0239a30) identified as "FilterManagerTagMonitor - 94029314479904" org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de02d62c0) ) org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de02d62c0) identified as "MessageListTagCacheMonitor - 139695556218208" org.kde.pim.imapresource: Get metadata failed: "GetAnnotation fehlgeschlagen, die Serverantwort lautet: A000008 BAD GETANNOTATION Invalid entry list format " org.kde.pim.imapresource: Get metadata failed: "GetAnnotation fehlgeschlagen, die Serverantwort lautet: A000014 BAD GETANNOTATION Invalid entry list format " org.kde.pim.akonadiserver.search: Executing search "kontact-48271-SearchSession" org.kde.pim.akonadiserver.search: Search "kontact-48271-SearchSession" done (without remote search) org.kde.pim.imapresource: Get metadata failed: "GetAnnotation fehlgeschlagen, die Serverantwort lautet: A000021 BAD GETANNOTATION Invalid entry list format " org.kde.pim.imapresource: Get metadata failed: "GetAnnotation fehlgeschlagen, die Serverantwort lautet: A000027 BAD GETANNOTATION Invalid entry list format " org.kde.pim.akonadiserver.search: Executing search "kontact-48271-SearchSession" org.kde.pim.akonadiserver.search: Search "kontact-48271-SearchSession" done (without remote search) org.kde.pim.akonadiserver.search: Executing search "kontact-48271-SearchSession" org.kde.pim.akonadiserver.search: Search "kontact-48271-SearchSession" done (without remote search) org.kde.pim.akonadiserver.search: Executing search "kontact-48271-SearchSession" org.kde.pim.akonadiserver.search: Search "kontact-48271-SearchSession" done (without remote search) org.kde.pim.imapresource: Get metadata failed: "GetAnnotation fehlgeschlagen, die Serverantwort lautet: A000034 BAD GETANNOTATION Invalid entry list format " org.kde.pim.imapresource: Get metadata failed: "GetAnnotation fehlgeschlagen, die Serverantwort lautet: A000042 BAD GETANNOTATION Invalid entry list format " org.kde.pim.imapresource: Get metadata failed: "GetAnnotation fehlgeschlagen, die Serverantwort lautet: A000049 BAD GETANNOTATION Invalid entry list format " org.kde.pim.imapresource: Get metadata failed: "GetAnnotation fehlgeschlagen, die Serverantwort lautet: A000058 BAD GETANNOTATION Invalid entry list format " org.kde.pim.imapresource: Get metadata failed: "GetAnnotation fehlgeschlagen, die Serverantwort lautet: A000065 BAD GETANNOTATION Invalid entry list format " org.kde.pim.imapresource: Get metadata failed: "GetAnnotation fehlgeschlagen, die Serverantwort lautet: A000072 BAD GETANNOTATION Invalid entry list format " org.kde.pim.akonadiserver: New notification connection (registered as Akonadi::Server::NotificationSubscriber(0x7f9de0001c00) ) org.kde.pim.akonadiserver: Subscriber Akonadi::Server::NotificationSubscriber(0x7f9de0001c00) identified as "SpecialCollectionsMonitor - 94419594987360" org.kde.pim.imapresource: Get metadata failed: "GetAnnotation fehlgeschlagen, die Serverantwort lautet: A000079 BAD GETANNOTATION Invalid entry list format " org.kde.pim.akonadiprivate: Warning: failed to remove "/home/anton/.local/share/akonadi/file_db_data/43/25743_r0" while committing a transaction Tokenizer Warning: 8Bit character ' -61 ' Tokenizer Warning: 8Bit character ' -68 ' Tokenizer Warning: 8Bit character ' -61 ' Tokenizer Warning: 8Bit character ' -92 ' Tokenizer Warning: 8Bit character ' -61 ' Tokenizer Warning: 8Bit character ' -68 ' Tokenizer Warning: 8Bit character ' -61 ' Tokenizer Warning: 8Bit character ' -68 ' Tokenizer Warning: 8Bit character ' -61 ' Tokenizer Warning: 8Bit character ' -68 ' Tokenizer Warning: 8Bit character ' -61 ' Tokenizer Warning: 8Bit character ' -68 ' Tokenizer Warning: 8Bit character ' -30 ' Tokenizer Warning: 8Bit character ' -126 ' Tokenizer Warning: 8Bit character ' -84 ' org.kde.pim.akonadiprivate: Warning: failed to remove "/home/anton/.local/share/akonadi/file_db_data/76/24576_r0" while committing a transaction org.kde.pim.akonadiprivate: Warning: failed to remove "/home/anton/.local/share/akonadi/file_db_data/73/24573_r0" while committing a transaction org.kde.pim.akonadiprivate: Warning: failed to remove "/home/anton/.local/share/akonadi/file_db_data/70/24570_r0" while committing a transaction org.kde.pim.akonadiprivate: Warning: failed to remove "/home/anton/.local/share/akonadi/file_db_data/64/24564_r0" while committing a transaction org.kde.pim.akonadiprivate: Warning: failed to remove "/home/anton/.local/share/akonadi/file_db_data/52/24552_r0" while committing a transaction org.kde.pim.akonadiprivate: Warning: failed to remove "/home/anton/.local/share/akonadi/file_db_data/46/24546_r0" while committing a transaction org.kde.pim.akonadiprivate: Warning: failed to remove "/home/anton/.local/share/akonadi/file_db_data/40/24540_r0" while committing a transaction org.kde.pim.akonadiprivate: Warning: failed to remove "/home/anton/.local/share/akonadi/file_db_data/31/24531_r0" while committing a transaction org.kde.pim.akonadiprivate: Warning: failed to remove "/home/anton/.local/share/akonadi/file_db_data/53/24153_r0" while committing a transaction org.kde.pim.akonadiprivate: Warning: failed to remove "/home/anton/.local/share/akonadi/file_db_data/39/23939_r0" while committing a transaction org.kde.pim.akonadiprivate: Warning: failed to remove "/home/anton/.local/share/akonadi/file_db_data/24/23924_r0" while committing a transaction org.kde.pim.akonadiprivate: Warning: failed to remove "/home/anton/.local/share/akonadi/file_db_data/00/23900_r0" while committing a transaction org.kde.pim.akonadiprivate: Warning: failed to remove "/home/anton/.local/share/akonadi/file_db_data/94/23894_r0" while committing a transaction org.kde.pim.akonadiprivate: Warning: failed to remove "/home/anton/.local/share/akonadi/file_db_data/91/23891_r0" while committing a transaction org.kde.pim.akonadiprivate: Warning: failed to remove "/home/anton/.local/share/akonadi/file_db_data/88/23888_r0" while committing a transaction org.kde.pim.akonadiprivate: Warning: failed to remove "/home/anton/.local/share/akonadi/file_db_data/85/23885_r0" while committing a transaction org.kde.pim.akonadiprivate: Warning: failed to remove "/home/anton/.local/share/akonadi/file_db_data/36/23736_r0" while committing a transaction org.kde.pim.akonadiprivate: Warning: failed to remove "/home/anton/.local/share/akonadi/file_db_data/33/23733_r0" while committing a transaction org.kde.pim.akonadiprivate: Warning: failed to remove "/home/anton/.local/share/akonadi/file_db_data/30/23730_r0" while committing a transaction