I chose Maildir resource as a component, cause the error message relates to it. I am aware that it may be a state synchronisation issue between KMail, Akonadi server and maildir resource. So feel free to reassign. As reported in bug #345084 (kmail´s message list view gui slows down moving thousands of mails in local maildir extremely) I moved a few ten thousand of mails with KMail from one local maildir file to another. Reproducible: Didn't try Steps to Reproduce: Copied from the other bug report on how I have done it: 1. Have a local maildir folder with about 60000 mails as source 2. Have a local maildir folder with about 12000 mails as destination. 3. Move about 20000 or 30000 of mails from source to destinations in three or four steps - Select first mail - Select last mail you want to move with shift click - Drag to other folder and select move. Do it in these three different ways: 1. Have source folder in usual threading view by activity. 2. Have source folder in flat date view. 3. Immediately switch to another folder after you started the move operation. Actual Results: Lots of notifications that Akonadi couldn´t move a mail file. And the following in .xsession-errors: request for item 1367933 succeeded posting retrieval request for item 1367934 there are 1 queues and 0 items in mine processing retrieval request for item 1367934 parts: ("RFC822", "HEAD") of resource: "akonadi_maildir_resource_0" request for item 1367934 still pending - waiting continuing request for item 1367934 succeeded posting retrieval request for item 1367935 there are 1 queues and 0 items in mine request for item 1367935 still pending - waiting processing retrieval request for item 1367935 parts: ("RFC822", "HEAD") of resource: "akonadi_maildir_resource_0" continuing request for item 1367935 succeeded posting retrieval request for item 1367937 there are 1 queues and 0 items in mine request for item 1367937 still pending - waiting processing retrieval request for item 1367937 parts: ("RFC822", "HEAD") of resource: "akonadi_maildir_resource_0" continuing request for item 1367937 succeeded posting retrieval request for item 1367938 there are 1 queues and 0 items in mine request for item 1367938 still pending - waiting processing retrieval request for item 1367938 parts: ("RFC822", "HEAD") of resource: "akonadi_maildir_resource_0" continuing request for item 1367938 succeeded posting retrieval request for item 1367939 there are 1 queues and 0 items in mine request for item 1367939 still pending - waiting processing retrieval request for item 1367939 parts: ("RFC822", "HEAD") of resource: "akonadi_maildir_resource_0" continuing request for item 1367939 succeeded posting retrieval request for item 1367941 there are 1 queues and 0 items in mine request for item 1367941 still pending - waiting processing retrieval request for item 1367941 parts: ("RFC822", "HEAD") of resource: "akonadi_maildir_resource_0" continuing request for item 1367941 succeeded posting retrieval request for item 1367999 there are 1 queues and 0 items in mine request for item 1367999 still pending - waiting processing retrieval request for item 1367999 parts: ("RFC822", "HEAD") of resource: "akonadi_maildir_resource_0" continuing request for item 1367999 succeeded posting retrieval request for item 1368123 there are 1 queues and 0 items in mine request for item 1368123 still pending - waiting processing retrieval request for item 1368123 parts: ("RFC822", "HEAD") of resource: "akonadi_maildir_resource_0" continuing request for item 1368123 succeeded QIODevice::setTextModeEnabled: The device is not open Could not find the database of available applications, run update-command-not-found as root to fix this QIODevice::setTextModeEnabled: The device is not open Could not find the database of available applications, run update-command-not-found as root to fix this QIODevice::setTextModeEnabled: The device is not open Could not find the database of available applications, run update-command-not-found as root to fix this QIODevice::setTextModeEnabled: The device is not open Could not find the database of available applications, run update-command-not-found as root to fix this QIODevice::setTextModeEnabled: The device is not open Could not find the database of available applications, run update-command-not-found as root to fix this QIODevice::setTextModeEnabled: The device is not open Could not find the database of available applications, run update-command-not-found as root to fix this (process:30092): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed ATTENTION: default value of option force_s3tc_enable overridden by environment. Can't find symbol 'glXCreateContextAttribsARB'. QFileSystemWatcher: failed to add paths: /home/martin/.kde/share/config/activitymanager-pluginsrc X Error: BadWindow (invalid Window parameter) 3 Major opcode: 2 (X_ChangeWindowAttributes) Resource id: 0x2000748 QFileSystemWatcher: failed to add paths: /home/martin/.kde/share/config/activitymanager-pluginsrc kmail2(3163) MessageList::Core::ModelInvariantRowMapperPrivate::modelIndexRowToModelInvariantIndexInternal: Requested invariant for storage row index 62 not found in history kmail2(3163) MessageList::Core::ModelInvariantRowMapperPrivate::modelIndexRowToModelInvariantIndexInternal: Requested invariant for storage row index 63 not found in history kmail2(3163) MessageList::Core::ModelInvariantRowMapperPrivate::modelIndexRowToModelInvariantIndexInternal: Requested invariant for storage row index 64 not found in history kmail2(3163) MessageList::Core::ModelInvariantRowMapperPrivate::modelIndexRowToModelInvariantIndexInternal: Requested invariant for storage row index 65 not found in history kmail2(3163) MessageList::Core::ModelInvariantRowMapperPrivate::modelIndexRowToModelInvariantIndexInternal: Requested invariant for storage row index 66 not found in history kmail2(3163) MessageList::Core::ModelInvariantRowMapperPrivate::modelIndexRowToModelInvariantIndexInternal: Requested invariant for storage row index 67 not found in history kmail2(3163) MessageList::Core::ModelInvariantRowMapperPrivate::modelIndexRowToModelInvariantIndexInternal: Requested invariant for storage row index 68 not found in history QFileSystemWatcher: failed to add paths: /home/martin/.kde/share/config/activitymanager-pluginsrc SEARCH: Query: "{ "limit" : -1, "negated" : false, "rel" : 1, "subTerms" : [ { "cond" : 0, "key" : "email", "negated" : false, "value" : "dan.carpenter@oracle.com" } ] }" MimeTypes: ("text/directory") Collections: QVector(276) Remote: false Recursive true Executing search "kmail2-2076624867-SearchSession" Search done "kmail2-2076624867-SearchSession" (without remote search) Result: 0 matches [ConvConfHandler] isPreferred contentType: multipart/x-mixed-replace [ConvConfHandler] isPreferred contentType: multipart/x-mixed-replace AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424446067.R619.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424446067.R599.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424446067.R196.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424446067.R683.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424446067.R620.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424446067.R821.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424446067.R411.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424446067.R919.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424446067.R670.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424446067.R622.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424446067.R30.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424446067.R130.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424446067.R39.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424446067.R634.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424446067.R59.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424446068.R410.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424446068.R146.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424446068.R380.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424446068.R115.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424446068.R690.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424446068.R324.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424446068.R176.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424446068.R734.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424447870.R528.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424447870.R149.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424447870.R387.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424447870.R41.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424447870.R728.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424447870.R293.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424447870.R76.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424447870.R919.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424447870.R445.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424447870.R292.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424447870.R541.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424447870.R4.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424447870.R688.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424447870.R592.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R209.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R442.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R208.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R247.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R780.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R666.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R784.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R156.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R512.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R136.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R832.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R632.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R216.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R882.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R667.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R644.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R910.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R658.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R62.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R198.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R912.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R889.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R496.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R240.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R423.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R27.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R698.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R622.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R332.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R813.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R637.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R981.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R399.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424449673.R328.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424451475.R360.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424451475.R103.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424451476.R737.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424451476.R431.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424451476.R727.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424451476.R409.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424451476.R285.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424451476.R12.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424451476.R483.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424451476.R283.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424451476.R792.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424451476.R952.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424451476.R191.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424451476.R739.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424451476.R924.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424451476.R154.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424453278.R763.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424453278.R769.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424453278.R900.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424453279.R217.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424453279.R479.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424453279.R845.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424453279.R427.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424453279.R354.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424453279.R585.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424453279.R414.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424453279.R993.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424453279.R436.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424453279.R816.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424453279.R659.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424453279.R323.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424455081.R200.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424455081.R57.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424455081.R304.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424455081.R540.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424455081.R732.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424455081.R213.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424455081.R588.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424455081.R629.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424455081.R450.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424455081.R342.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424455081.R266.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424455081.R316.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424455081.R364.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424455081.R36.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424455082.R235.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424455082.R932.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424455082.R454.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424455082.R366.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424455082.R710.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424455082.R724.merkaba" AkonadiAgentServer(2747) KPIM::Maildir::moveEntryTo: Unable to find: "1424455082.R968.merkaba" X Error: BadWindow (invalid Window parameter) 3 Major opcode: 2 (X_ChangeWindowAttributes) Resource id: 0x2000765 found 124 item parts to expire in collection "_Posteingang" found 2 item parts to expire in collection "pm-ml" found 41392 item parts to expire in collection "kernel-ml-2015-1" found 6 item parts to expire in collection "intel-gfx-ml" found 2 item parts to expire in collection "fsdevel-ml" found 2 item parts to expire in collection "frameworks-devel-ml" found 6 item parts to expire in collection "mesa-dev-ml" found 2 item parts to expire in collection "os4-dev-ml" QFileSystemWatcher: failed to add paths: /home/martin/.kde/share/config/activitymanager-pluginsrc kbuildsycoca4 running... kbuildsycoca4(2966)/kdecore (services) KServicePrivate::init: The desktop entry file "ServiceMenus/signfile.desktop" has Type= "Application" but no Exec line kbuildsycoca4(2966) KBuildServiceFactory::createEntry: Invalid Service : "ServiceMenus/signfile.desktop" X Error: BadWindow (invalid Window parameter) 3 Major opcode: 2 (X_ChangeWindowAttributes) Resource id: 0x2000e14 QFileSystemWatcher: failed to add paths: /home/martin/.kde/share/config/activitymanager-pluginsrc posting retrieval request for item 1031299 there are 1 queues and 0 items in mine request for item 1031299 still pending - waiting processing retrieval request for item 1031299 parts: ("RFC822", "HEAD") of resource: "akonadi_maildir_resource_0" continuing request for item 1031299 succeeded SEARCH: Query: "{ "limit" : -1, "negated" : false, "rel" : 1, "subTerms" : [ { "cond" : 0, "key" : "email", "negated" : false, "value" : "jeffrey.t.kirsher@intel.com" } ] }" MimeTypes: ("text/directory") Collections: QVector(276) Remote: false Recursive true Executing search "kmail2-2076624867-SearchSession" Search done "kmail2-2076624867-SearchSession" (without remote search) Result: 0 matches posting retrieval request for item 1031779 there are 1 queues and 0 items in mine request for item 1031779 still pending - waiting processing retrieval request for item 1031779 parts: ("RFC822", "HEAD") of resource: "akonadi_maildir_resource_0" continuing request for item 1031779 succeeded SEARCH: Query: "{ "limit" : -1, "negated" : false, "rel" : 1, "subTerms" : [ { "cond" : 0, "key" : "email", "negated" : false, "value" : "gang.chen@sunrus.com.cn" } ] }" MimeTypes: ("text/directory") Collections: QVector(276) Remote: false Recursive true Executing search "kmail2-2076624867-SearchSession" Search done "kmail2-2076624867-SearchSession" (without remote search) Result: 0 matches posting retrieval request for item 1031300 there are 1 queues and 0 items in mine request for item 1031300 still pending - waiting processing retrieval request for item 1031300 parts: ("RFC822", "HEAD") of resource: "akonadi_maildir_resource_0" continuing request for item 1031300 succeeded posting retrieval request for item 1031301 there are 1 queues and 0 items in mine request for item 1031301 still pending - waiting processing retrieval request for item 1031301 parts: ("RFC822", "HEAD") of resource: "akonadi_maildir_resource_0" continuing request for item 1031301 succeeded posting retrieval request for item 1031302 there are 1 queues and 0 items in mine request for item 1031302 still pending - waiting processing retrieval request for item 1031302 parts: ("RFC822", "HEAD") of resource: "akonadi_maildir_resource_0" continuing request for item 1031302 succeeded posting retrieval request for item 1031303 there are 1 queues and 0 items in mine request for item 1031303 still pending - waiting processing retrieval request for item 1031303 parts: ("RFC822", "HEAD") of resource: "akonadi_maildir_resource_0" continuing request for item 1031303 succeeded posting retrieval request for item 1031304 there are 1 queues and 0 items in mine request for item 1031304 still pending - waiting processing retrieval request for item 1031304 parts: ("RFC822", "HEAD") of resource: "akonadi_maildir_resource_0" continuing request for item 1031304 succeeded posting retrieval request for item 1031305 there are 1 queues and 0 items in mine request for item 1031305 still pending - waiting processing retrieval request for item 1031305 parts: ("RFC822", "HEAD") of resource: "akonadi_maildir_resource_0" continuing request for item 1031305 succeeded posting retrieval request for item 1031306 there are 1 queues and 0 items in mine request for item 1031306 still pending - waiting processing retrieval request for item 1031306 parts: ("RFC822", "HEAD") of resource: "akonadi_maildir_resource_0" continuing request for item 1031306 succeeded posting retrieval request for item 1031307 there are 1 queues and 0 items in mine request for item 1031307 still pending - waiting processing retrieval request for item 1031307 parts: ("RFC822", "HEAD") of resource: "akonadi_maildir_resource_0" continuing request for item 1031307 succeeded posting retrieval request for item 1031308 there are 1 queues and 0 items in mine request for item 1031308 still pending - waiting processing retrieval request for item 1031308 parts: ("RFC822", "HEAD") of resource: "akonadi_maildir_resource_0" continuing request for item 1031308 succeeded posting retrieval request for item 1031309 there are 1 queues and 0 items in mine request for item 1031309 still pending - waiting processing retrieval request for item 1031309 parts: ("RFC822", "HEAD") of resource: "akonadi_maildir_resource_0" continuing request for item 1031309 succeeded posting retrieval request for item 1031310 there are 1 queues and 0 items in mine request for item 1031310 still pending - waiting processing retrieval request for item 1031310 parts: ("RFC822", "HEAD") of resource: "akonadi_maildir_resource_0" continuing Expected Results: No error messages whatsoever. I am just moving mails. There has been no filesystem errors or anything like that. Its all good. And so no reason for error mesages. What I bet may have happened here: I may accidentally told KMail to move some mails twice. Then Akonadi may have moved them already on the first move operation and didn´t find them anymore on the second move operation. I suspect this, cause I do not see that any mails are missing or lost. My expected results if my assumption is true are clear: Best: I am not able to move the same mails twice. They are immediately grayed out for selection. Currently they aren´t and it takes quite some time till they are. Second best: There is no error message and the move is just done once. Anything else is inconsistent to the user. I can reproduce something like this on move operations of single mails as well. If Akonadi is busy with something else (or it self, who knows), even such a single mail move operation doesn´t take place immediately and the mail is not grayed out either to indicate that it is in the process of being moved. Then I am sometimes unsure, whether I moved it already and thus move it again. Then I get the same error. I know getting this asynchronous stuff right can be challenging, but I think its important to give immediate feedback in KMail GUI in move and delete cases. Do not let the user guess whether KMail received the command and is really processing it. Maybe thats something for Akonadi Next, but I think its very important to have this.
This bug has never been confirmed for a KDE PIM version that is based on KDE Frameworks (5.x). Those versions differ significantly from the old 4.x series. Therefore, I plan to close it in around two or three months. In the meantime, it is set to WAITINGFORINFO to give reporters the oportunity to check if it is still valid. As soon as someone confirms it for a recent version (at least 5.1, ideally even more recent), I'll gladly reopen it. Please understand that we lack the manpower to triage bugs reported for versions almost two years beyond their end of life.
Just as announced in my last comment, I close this bug. If you encounter it again in a recent version (at least 5.1 aka 15.12; preferably much more recent), please open a new one unless it already exists. Thank you for all your input.