PhabricatorTaskmasterDaemon is crashing when doing a PhabricatorRepositoryGitCommitMessageParserWorker job. This job is continuously retried and
fairfails forever with:
```
[2015-10-27 17:59:26] EXCEPTION: (PhutilProxyException) Error while executing Task ID 809104. {>} (AphrontQueryException) #1153: Got a packet bigger than 'max_allowed_packet' bytes at [<phutil>/src/aphront/storage/connection/mysql/AphrontBaseMySQLDatabaseConnection.php:311]
arcanist(head=master, ref.master=3308da5f8fbe), phabricator(head=master, ref.master=d92f7a14739a), phutil(head=master, ref.master=59f5a8d2bb82)
#0 <#2> AphrontBaseMySQLDatabaseConnection::throwQueryCodeException(integer, string) called at [<phutil>/src/aphront/storage/connection/mysql/AphrontBaseMySQLDatabaseConnection.php:275]
#1 <#2> AphrontBaseMySQLDatabaseConnection::throwQueryException(mysqli) called at [<phutil>/src/aphront/storage/connection/mysql/AphrontBaseMySQLDatabaseConnection.php:181]
#2 <#2> AphrontBaseMySQLDatabaseConnection::executeRawQuery(string) called at [<phutil>/src/xsprintf/queryfx.php:6]
#3 <#2> queryfx(AphrontMySQLiDatabaseConnection, string, string, string, array, string)
#4 <#2> call_user_func_array(string, array) called at [<phutil>/src/aphront/storage/connection/AphrontDatabaseConnection.php:28]
#5 <#2> AphrontDatabaseConnection::query(string, string, string, array, string) called at [<phabricator>/src/infrastructure/storage/lisk/LiskDAO.php:1261]
#6 <#2> LiskDAO::insertRecordIntoDatabase(string) called at [<phabricator>/src/infrastructure/storage/lisk/LiskDAO.php:1106]
#7 <#2> LiskDAO::insert() called at [<phabricator>/src/infrastructure/storage/lisk/LiskDAO.php:1075]
#8 <#2> LiskDAO::save() called at [<phabricator>/src/applications/differential/storage/DifferentialModernHunk.php:87]
#9 <#2> DifferentialModernHunk::save() called at [<phabricator>/src/applications/differential/storage/DifferentialChangeset.php:92]
#10 <#2> DifferentialChangeset::save() called at [<phabricator>/src/applications/differential/storage/DifferentialDiff.php:120]
#11 <#2> DifferentialDiff::save() called at [<phabricator>/src/applications/repository/worker/commitmessageparser/PhabricatorRepositoryCommitMessageParserWorker.php:338]
#12 <#2> PhabricatorRepositoryCommitMessageParserWorker::generateFinalDiff(DifferentialRevision, string) called at [<phabricator>/src/applications/repository/worker/commitmessageparser/PhabricatorRepositoryCommitMessageParserWorker.php:219]
#13 <#2> PhabricatorRepositoryCommitMessageParserWorker::updateCommitData(DiffusionCommitRef) called at [<phabricator>/src/applications/repository/worker/commitmessageparser/PhabricatorRepositoryGitCommitMessageParserWorker.php:11]
#14 <#2> PhabricatorRepositoryGitCommitMessageParserWorker::parseCommitWithRef(PhabricatorRepository, PhabricatorRepositoryCommit, DiffusionCommitRef) called at [<phabricator>/src/applications/repository/worker/commitmessageparser/PhabricatorRepositoryCommitMessageParserWorker.php:40]
#15 <#2> PhabricatorRepositoryCommitMessageParserWorker::parseCommit(PhabricatorRepository, PhabricatorRepositoryCommit) called at [<phabricator>/src/applications/repository/worker/PhabricatorRepositoryCommitParserWorker.php:44]
#16 <#2> PhabricatorRepositoryCommitParserWorker::doWork() called at [<phabricator>/src/infrastructure/daemon/workers/PhabricatorWorker.php:122]
#17 <#2> PhabricatorWorker::executeTask() called at [<phabricator>/src/infrastructure/daemon/workers/storage/PhabricatorWorkerActiveTask.php:171]
#18 <#2> PhabricatorWorkerActiveTask::executeTask() called at [<phabricator>/src/infrastructure/daemon/workers/PhabricatorTaskmasterDaemon.php:22]
#19 PhabricatorTaskmasterDaemon::run() called at [<phutil>/src/daemon/PhutilDaemon.php:183]
#20 PhutilDaemon::execute() called at [<phutil>/scripts/daemon/exec/exec_daemon.php:125]
```
Also in the daemon logs:
```
FAIL Tue, Oct 27 5:59 PM Process exited with error 255
STDE Tue, Oct 27 5:59 PM [2015-10-27 17:59:26] EXCEPTION: (PhutilProxyException) Error while executing Task ID 809104. {>} (AphrontQueryException) #1153: Got a packet bigger than 'max_allowed_packet' bytes at [<phutil>/src/aphront/storage/connection/mysql/AphrontBaseMySQLDatabaseConnection.php:311]
arcanist(head=master, ref.master=3308da5f8fbe), phabricator(head=master, ref.master=d92f7a14739a), phutil(head=master, ref.master=59f5a8d2bb82)
#0 <#2> AphrontBaseMySQLDatabaseConnection::throwQueryCodeException(integer, string) called at [<phutil>/src/aphront/storage/connection/mysql/AphrontBaseMySQLDatabaseConnection.php:275]
#1 <#2> AphrontBaseMySQLDatabaseConnection::throwQueryException(mysqli) called at [<phutil>/src/aphront/storage/connection/mysql/AphrontBaseMySQLDatabaseConnection.php:181]
#2 <#2> AphrontBaseMySQLDatabaseConnection::executeRawQuery(string) called at [<phutil>/src/xsprintf/queryfx.php:6]
#3 <#2> queryfx(AphrontMySQLiDatabaseConnection, string, string, string, array, string)
#4 <#2> call_user_func_array(string, array) called at [<phutil>/src/aphront/storage/connection/AphrontDatabaseConnection.php:28]
#5 <#2> AphrontDatabaseConnection::query(string, string, string, array, string) called at [<phabricator>/src/infrastructure/storage/lisk/LiskDAO.php:1261]
#6 <#2> LiskDAO::insertRecordIntoDatabase(string) called at [<phabricator>/src/infrastructure/storage/lisk/LiskDAO.php:1106]
#7 <#2> LiskDAO::insert() called at [<phabricator>/src/infrastructure/storage/lisk/LiskDAO.php:1075]
#8 <#2> LiskDAO::save() called at [<phabricator>/src/applications/differential/storage/DifferentialModernHunk.php:87]
#9 <#2> DifferentialModernHunk::save() called at [<phabricator>/src/applications/differential/storage/DifferentialChangeset.php:92]
...
Show 11 more line(s)...
STDO Tue, Oct 27 5:59 PM <Malformed> thrown in /Users/osystem/Sites/phabricator/libphutil/src/aphront/storage/connection/AphrontDatabaseTransactionState.php on line 78
STDO Tue, Oct 27 5:59 PM <Malformed> #1 {main}
STDO Tue, Oct 27 5:59 PM <Malformed> #0 [internal function]: AphrontDatabaseTransactionState->__destruct()
STDO Tue, Oct 27 5:59 PM <Malformed> Stack trace:
STDO Tue, Oct 27 5:59 PM <Malformed> Fatal error: Uncaught exception 'Exception' with message 'Process exited with an open transaction! The transaction will be implicitly rolled back. Calls to openTransaction() must always be paired with a call to saveTransaction() or killTransaction().' in /Users/osystem/Sites/phabricator/libphutil/src/aphront/storage/connection/AphrontDatabaseTransactionState.php:78
STDO Tue, Oct 27 5:59 PM <Malformed>
INIT Tue, Oct 27 5:54 PM Starting process.
```