Phabricator daemons will crash and restart continuously when attempting to update a repository. This seems to be caused by attempting to email a user who cannot view the repository.
```
[2015-08-04 11:14:59] EXCEPTION: (PhutilProxyException) Error while executing Task ID 494684. {>} (Exception) No such repository 'RS'. at [<phabricator>/src/applications/diffusion/request/DiffusionRequest.php:159]
arcanist(head=master, ref.master=0d6f3328a08f), phabricator(head=master, ref.master=ec7a0837d56d), phutil(head=master, ref.master=aa6cd8f7e5e5)
#0 <#2> DiffusionRequest::newFromCallsign(string, PhabricatorUser) called at [<phabricator>/src/applications/diffusion/request/DiffusionRequest.php:86]
#1 <#2> DiffusionRequest::newFromDictionary(array) called at [<phabricator>/src/applications/diffusion/conduit/DiffusionQueryConduitAPIMethod.php:105]
#2 <#2> DiffusionQueryConduitAPIMethod::execute(ConduitAPIRequest) called at [<phabricator>/src/applications/conduit/method/ConduitAPIMethod.php:90]
#3 <#2> ConduitAPIMethod::executeMethod(ConduitAPIRequest) called at [<phabricator>/src/applications/conduit/call/ConduitCall.php:135]
#4 <#2> ConduitCall::executeMethod() called at [<phabricator>/src/applications/conduit/call/ConduitCall.php:85]
#5 <#2> ConduitCall::execute() called at [<phabricator>/src/applications/repository/customfield/PhabricatorCommitTagsField.php:34]
#6 <#2> PhabricatorCommitTagsField::updateTransactionMailBody(PhabricatorMetaMTAMailBody, PhabricatorAuditEditor, array) called at [<phabricator>/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php:2631]
#7 <#2> PhabricatorApplicationTransactionEditor::addCustomFieldsToMailBody(PhabricatorMetaMTAMailBody, PhabricatorRepositoryCommit, array) called at [<phabricator>/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php:2561]
#8 <#2> PhabricatorApplicationTransactionEditor::buildMailBody(PhabricatorRepositoryCommit, array) called at [<phabricator>/src/applications/audit/editor/PhabricatorAuditEditor.php:646]
#9 <#2> PhabricatorAuditEditor::buildMailBody(PhabricatorRepositoryCommit, array) called at [<phabricator>/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php:2326]
#10 <#2> PhabricatorApplicationTransactionEditor::buildMailForTarget(PhabricatorRepositoryCommit, array, PhabricatorMailTarget) called at [<phabricator>/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php:2285]
#11 <#2> PhabricatorApplicationTransactionEditor::buildMail(PhabricatorRepositoryCommit, array) called at [<phabricator>/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php:1046]
#12 <#2> PhabricatorApplicationTransactionEditor::publishTransactions(PhabricatorRepositoryCommit, array) called at [<phabricator>/src/applications/transactions/worker/PhabricatorApplicationTransactionPublishWorker.php:21]
#13 <#2> PhabricatorApplicationTransactionPublishWorker::doWork() called at [<phabricator>/src/infrastructure/daemon/workers/PhabricatorWorker.php:91]
#14 <#2> PhabricatorWorker::executeTask() called at [<phabricator>/src/infrastructure/daemon/workers/storage/PhabricatorWorkerActiveTask.php:162]
#15 <#2> PhabricatorWorkerActiveTask::executeTask() called at [<phabricator>/src/infrastructure/daemon/workers/PhabricatorTaskmasterDaemon.php:22]
#16 PhabricatorTaskmasterDaemon::run() called at [<phutil>/src/daemon/PhutilDaemon.php:183]
#17 PhutilDaemon::execute() called at [<phutil>/scripts/daemon/exec/exec_daemon.php:125]
```
This succeeds when running a manual update from the command line:
```
sse-review:phabricator osystem$ ./bin/repository update --trace RS
>>> [2] <connect> phabricator_repository
<<< [2] <connect> 910 us
>>> [3] <query> SELECT `r`.* FROM `repository` r WHERE (r.callsign IN ('RS')) ORDER BY `r`.`id` DESC
<<< [3] <query> 296 us
>>> [4] <lock> ph:phabric-6rILUDHKjHKu:repository.update:58
>>> [5] <connect> phabricator_repository
<<< [5] <connect> 277 us
>>> [6] <query> SET wait_timeout = 2147483
<<< [6] <query> 97 us
>>> [7] <query> SELECT GET_LOCK('ph:phabric-6rILUDHKjHKu:repository.update:58', 0)
<<< [7] <query> 139 us
>>> [8] <connect> phabricator_repository
<<< [8] <connect> 323 us
>>> [9] <query> INSERT INTO `repository_statusmessage`
(repositoryID, statusType, statusCode, parameters, epoch)
VALUES (58, 'init', 'working', '{\"message\":\"Updating the working copy for repository \'RS\'.\"}', 1438712450)
ON DUPLICATE KEY UPDATE
statusCode = VALUES(statusCode),
parameters = VALUES(parameters),
epoch = VALUES(epoch)
<<< [9] <query> 441 us
>>> [10] <exec> $ git remote show -n origin
<<< [10] <exec> 7,962 us
>>> [11] <exec> $ git rev-parse --show-toplevel
<<< [11] <exec> 7,213 us
>>> [12] <exec> $ git fetch origin '+refs/heads/*:refs/heads/*' --prune
<<< [12] <exec> 617,750 us
>>> [13] <query> INSERT INTO `repository_statusmessage`
(repositoryID, statusType, statusCode, parameters, epoch)
VALUES (58, 'init', 'okay', '{\"message\":null}', 1438712451)
ON DUPLICATE KEY UPDATE
statusCode = VALUES(statusCode),
parameters = VALUES(parameters),
epoch = VALUES(epoch)
<<< [13] <query> 641 us
>>> [14] <query> DELETE FROM `repository_statusmessage` WHERE repositoryID = 58 AND statusType = 'needs-update'
<<< [14] <query> 185 us
>>> [15] <exec> $ git remote show -n origin
<<< [15] <exec> 7,544 us
>>> [16] <exec> $ git for-each-ref --sort='-creatordate' --format='%(objectname)%01%(objecttype)%01%(refname)%01%(*objectname)%01%(*objecttype)%01%(subject)%01%(creator)' 'refs/heads/'
<<< [16] <exec> 8,782 us
>>> [17] <query> SELECT * FROM `repository_commit` WHERE repositoryID = 58 AND commitIdentifier IN ('95f27500067b39ac6247be38793a19f0b0993dd2', '95f27500067b39ac6247be38793a19f0b0993dd2', '4681ff12712cd1ed7623b9137c2f9d2e56165ae2')
<<< [17] <query> 452 us
>>> [18] <exec> $ git for-each-ref --sort='-creatordate' --format='%(objectname)%01%(objecttype)%01%(refname)%01%(*objectname)%01%(*objecttype)%01%(subject)%01%(creator)' 'refs/heads/'
<<< [18] <exec> 9,999 us
>>> [19] <exec> $ git for-each-ref --sort='-creatordate' --format='%(objectname)%01%(objecttype)%01%(refname)%01%(*objectname)%01%(*objecttype)%01%(subject)%01%(creator)' 'refs/tags/'
<<< [19] <exec> 7,679 us
>>> [20] <query> SELECT * FROM `repository_refcursor` r WHERE (repositoryPHID IN ('PHID-REPO-ixt73b7kl3p2hu53dbyz')) ORDER BY `id` DESC
<<< [20] <query> 437 us
>>> [21] <query> SELECT `r`.* FROM `repository` r WHERE (r.phid IN ('PHID-REPO-ixt73b7kl3p2hu53dbyz', 'PHID-REPO-ixt73b7kl3p2hu53dbyz', 'PHID-REPO-ixt73b7kl3p2hu53dbyz')) ORDER BY `r`.`id` DESC
<<< [21] <query> 330 us
>>> [22] <exec> $ git for-each-ref --sort='-creatordate' --format='%(objectname)%01%(objecttype)%01%(refname)%01%(*objectname)%01%(*objecttype)%01%(subject)%01%(creator)' 'refs/heads/'
>>> [23] <exec> $ git for-each-ref --sort='-creatordate' --format='%(objectname)%01%(objecttype)%01%(refname)%01%(*objectname)%01%(*objecttype)%01%(subject)%01%(creator)' 'refs/tags/'
<<< [23] <exec> 7,172 us
<<< [22] <exec> 8,524 us
>>> [24] <exec> $ git cat-file --batch-check
<<< [24] <exec> 8,728 us
>>> [25] <query> SELECT * FROM `repository_mirror` WHERE (repositoryPHID IN ('PHID-REPO-ixt73b7kl3p2hu53dbyz')) ORDER BY `id` DESC
<<< [25] <query> 381 us
>>> [26] <query> INSERT INTO `repository_statusmessage`
(repositoryID, statusType, statusCode, parameters, epoch)
VALUES (58, 'fetch', 'okay', '[]', 1438712451)
ON DUPLICATE KEY UPDATE
statusCode = VALUES(statusCode),
parameters = VALUES(parameters),
epoch = VALUES(epoch)
<<< [26] <query> 473 us
>>> [27] <query> SELECT RELEASE_LOCK('ph:phabric-6rILUDHKjHKu:repository.update:58')
<<< [27] <query> 168 us
<<< [4] <lock> 705,339 us
Updated repository rRS.
```