SERVER-21677 Remove "diaglog" support from the server

18 files changed, 0 insertions, 596 deletions

diff --git a/debian/mongod.1 b/debian/mongod.1
index b775b7004d5..7982e554870 100644
--- a/debian/mongod.1
+++ b/debian/mongod.1
@@ -232,92 +232,6 @@ _
 .UNINDENT
 .INDENT 0.0
 .TP
-.B \-\-diaglog <value>
-\fIDefault\fP: 0
-.sp
-Deprecated since version 2.6.
-
-.sp
-\fI\%\-\-diaglog\fP is for internal use and not intended for most users.
-.sp
-Creates a very verbose \fIdiagnostic log\fP for troubleshooting and
-recording various errors. MongoDB writes these log files in the
-\fBdbPath\fP directory in a series of files that begin with the
-string \fBdiaglog\fP and end with the initiation time of the logging as a
-hex string.
-.sp
-The specified value configures the level of verbosity:
-.TS
-center;
-|l|l|.
-_
-T{
-Value
-T}	T{
-Setting
-T}
-_
-T{
-0
-T}	T{
-Off. No logging.
-T}
-_
-T{
-1
-T}	T{
-Log write operations.
-T}
-_
-T{
-2
-T}	T{
-Log read operations.
-T}
-_
-T{
-3
-T}	T{
-Log both read and write operations.
-T}
-_
-T{
-7
-T}	T{
-Log write and some read operations.
-T}
-_
-.TE
-.sp
-You can use the \fBmongosniff\fP tool to replay this output for
-investigation. Given a typical diaglog file located at
-\fB/data/db/diaglog.4f76a58c\fP, you might use a command in the following
-form to read these files:
-.INDENT 7.0
-.INDENT 3.5
-.sp
-.nf
-.ft C
-mongosniff \-\-source DIAGLOG /data/db/diaglog.4f76a58c
-.ft P
-.fi
-.UNINDENT
-.UNINDENT
-.sp
-\fBWARNING:\fP
-.INDENT 7.0
-.INDENT 3.5
-Setting the diagnostic level to \fB0\fP will cause \fBmongod\fP
-to stop writing data to the \fIdiagnostic log\fP file. However,
-the \fBmongod\fP instance will continue to keep the file open,
-even if it is no longer writing data to the file. If you want to
-rename, move, or delete the diagnostic log you must cleanly shut
-down the \fBmongod\fP instance before doing so.
-.UNINDENT
-.UNINDENT
-.UNINDENT
-.INDENT 0.0
-.TP
 .B \-\-traceExceptions
 For internal diagnostic use only.
 .UNINDENT
diff --git a/debian/mongosniff.1 b/debian/mongosniff.1
deleted file mode 100644
index 600a792c3df..00000000000
--- a/debian/mongosniff.1
+++ /dev/null
@@ -1,200 +0,0 @@
-.\" Man page generated from reStructuredText.
-.
-.TH "MONGOSNIFF" "1" "January 30, 2015" "3.0" "mongodb-manual"
-.SH NAME
-mongosniff \- MongoDB Protocol Introspection Utility
-.
-.nr rst2man-indent-level 0
-.
-.de1 rstReportMargin
-\\$1 \\n[an-margin]
-level \\n[rst2man-indent-level]
-level margin: \\n[rst2man-indent\\n[rst2man-indent-level]]
--
-\\n[rst2man-indent0]
-\\n[rst2man-indent1]
-\\n[rst2man-indent2]
-..
-.de1 INDENT
-.\" .rstReportMargin pre:
-. RS \\$1
-. nr rst2man-indent\\n[rst2man-indent-level] \\n[an-margin]
-. nr rst2man-indent-level +1
-.\" .rstReportMargin post:
-..
-.de UNINDENT
-. RE
-.\" indent \\n[an-margin]
-.\" old: \\n[rst2man-indent\\n[rst2man-indent-level]]
-.nr rst2man-indent-level -1
-.\" new: \\n[rst2man-indent\\n[rst2man-indent-level]]
-.in \\n[rst2man-indent\\n[rst2man-indent-level]]u
-..
-.SH SYNOPSIS
-.sp
-\fBmongosniff\fP provides a low\-level operation tracing/sniffing view
-into database activity in real time. Think of \fBmongosniff\fP as a
-MongoDB\-specific analogue of \fBtcpdump\fP for TCP/IP network
-traffic. Typically, \fBmongosniff\fP is most frequently used in driver
-development.
-.sp
-\fBNOTE:\fP
-.INDENT 0.0
-.INDENT 3.5
-\fBmongosniff\fP requires \fBlibpcap\fP and is only available for
-Unix\-like systems.
-.UNINDENT
-.UNINDENT
-.sp
-As an alternative to \fBmongosniff\fP, Wireshark, a popular
-network sniffing tool is capable of inspecting and parsing the MongoDB
-wire protocol.
-.SH OPTIONS
-.INDENT 0.0
-.TP
-.B mongosniff
-.UNINDENT
-.INDENT 0.0
-.TP
-.B mongosniff
-.UNINDENT
-.INDENT 0.0
-.TP
-.B \-\-help
-Returns information on the options and use of \fBmongosniff\fP\&.
-.UNINDENT
-.INDENT 0.0
-.TP
-.B \-\-forward <host><:port>
-Declares a host to forward all parsed requests that the
-\fBmongosniff\fP intercepts to another \fBmongod\fP instance
-and issue those operations on that database instance.
-.sp
-Specify the target host name and port in the \fB<host><:port>\fP format.
-.sp
-To connect to a replica set, specify the \fBreplica set name\fP and a seed list of set members. Use the
-following form:
-.INDENT 7.0
-.INDENT 3.5
-.sp
-.nf
-.ft C
-<replSetName>/<hostname1><:port>,<hostname2><:port>,<...>
-.ft P
-.fi
-.UNINDENT
-.UNINDENT
-.UNINDENT
-.INDENT 0.0
-.TP
-.B \-\-source <NET [interface]>
-Specifies source material to inspect. Use \fB\-\-source NET [interface]\fP
-to inspect traffic from a network interface (e.g. \fBeth0\fP or \fBlo\fP\&.)
-Use \fB\-\-source FILE [filename]\fP to read captured packets in
-\fIpcap\fP format.
-.sp
-You may use the \fB\-\-source DIAGLOG [filename]\fP option to read the
-output files produced by the \fI\-\-diaglog\fP
-option.
-.UNINDENT
-.INDENT 0.0
-.TP
-.B \-\-objcheck
-Displays invalid BSON objects only and nothing else. Use this option for
-troubleshooting driver development. This option has some performance
-impact on the performance of \fBmongosniff\fP\&.
-.UNINDENT
-.INDENT 0.0
-.TP
-.B <port>
-Specifies alternate ports to sniff for traffic. By default,
-\fBmongosniff\fP watches for MongoDB traffic on port \fB27017\fP\&. Append
-multiple port numbers to the end of \fBmongosniff\fP to monitor
-traffic on multiple ports.
-.UNINDENT
-.SH USE
-.sp
-Use the following command to connect to a \fBmongod\fP or
-\fBmongos\fP running on port 27017 \fIand\fP 27018 on the localhost
-interface:
-.INDENT 0.0
-.INDENT 3.5
-.sp
-.nf
-.ft C
-mongosniff \-\-source NET lo 27017 27018
-.ft P
-.fi
-.UNINDENT
-.UNINDENT
-.sp
-Use the following command to only log invalid \fIBSON\fP objects for
-the \fBmongod\fP or \fBmongos\fP running on the localhost
-interface and port 27018, for driver development and troubleshooting:
-.INDENT 0.0
-.INDENT 3.5
-.sp
-.nf
-.ft C
-mongosniff \-\-objcheck \-\-source NET lo 27018
-.ft P
-.fi
-.UNINDENT
-.UNINDENT
-.SH BUILD MONGOSNIFF
-.sp
-To build \fBmongosniff\fP yourself, Linux users can use the following
-procedure:
-.INDENT 0.0
-.IP 1. 3
-Obtain prerequisites using your operating
-systems package management software. Dependencies include:
-.INDENT 3.0
-.IP \(bu 2
-\fBlibpcap\fP \- to capture network packets.
-.IP \(bu 2
-\fBgit\fP \- to download the MongoDB source code.
-.IP \(bu 2
-\fBscons\fP and a C++ compiler \- to build \fBmongosniff\fP\&.
-.UNINDENT
-.IP 2. 3
-Download a copy of the MongoDB source code using \fBgit\fP:
-.INDENT 3.0
-.INDENT 3.5
-.sp
-.nf
-.ft C
-git clone git://github.com/mongodb/mongo.git
-.ft P
-.fi
-.UNINDENT
-.UNINDENT
-.IP 3. 3
-Issue the following sequence of commands to change to the
-\fBmongo/\fP directory and build \fBmongosniff\fP:
-.INDENT 3.0
-.INDENT 3.5
-.sp
-.nf
-.ft C
-cd mongo
-scons mongosniff
-.ft P
-.fi
-.UNINDENT
-.UNINDENT
-.UNINDENT
-.sp
-\fBNOTE:\fP
-.INDENT 0.0
-.INDENT 3.5
-If you run \fBscons mongosniff\fP before installing \fBlibpcap\fP you
-must run \fBscons clean\fP before you can build \fBmongosniff\fP\&.
-.UNINDENT
-.UNINDENT
-.SH AUTHOR
-MongoDB Documentation Project
-.SH COPYRIGHT
-2011-2015
-.\" Generated by docutils manpage writer.
-.
diff --git a/jstests/auth/lib/commands_lib.js b/jstests/auth/lib/commands_lib.js
index 077ed4fe388..90b8d1051f8 100644
--- a/jstests/auth/lib/commands_lib.js
+++ b/jstests/auth/lib/commands_lib.js
@@ -2246,20 +2246,6 @@ var authCommandsLib = {
           ]
         },
         {
-          testname: "diagLogging",
-          command: {diagLogging: 1},
-          skipSharded: true,
-          testcases: [
-              {
-                runOnDb: adminDbName,
-                roles: roles_hostManager,
-                privileges: [{resource: {cluster: true}, actions: ["diagLogging"]}]
-              },
-              {runOnDb: firstDbName, roles: {}},
-              {runOnDb: secondDbName, roles: {}}
-          ]
-        },
-        {
           testname: "distinct",
           command: {distinct: "coll", key: "a", query: {}},
           testcases: [
diff --git a/jstests/core/views/views_all_commands.js b/jstests/core/views/views_all_commands.js
index b56d61fe7a7..ff5842be316 100644
--- a/jstests/core/views/views_all_commands.js
+++ b/jstests/core/views/views_all_commands.js
@@ -180,7 +180,6 @@
         },
         dbStats: {skip: "TODO(SERVER-25948)"},
         delete: {command: {delete: "view", deletes: [{q: {x: 1}, limit: 1}]}, expectFailure: true},
-        diagLogging: {skip: isUnrelated},
         distinct: {command: {distinct: "view", key: "_id"}},
         driverOIDTest: {skip: isUnrelated},
         drop: {command: {drop: "view"}},
diff --git a/jstests/sharding/safe_secondary_reads_drop_recreate.js b/jstests/sharding/safe_secondary_reads_drop_recreate.js
index 5b49fd1dc24..488906bef52 100644
--- a/jstests/sharding/safe_secondary_reads_drop_recreate.js
+++ b/jstests/sharding/safe_secondary_reads_drop_recreate.js
@@ -132,7 +132,6 @@
         dbHash: {skip: "does not return user data"},
         dbStats: {skip: "does not return user data"},
         delete: {skip: "primary only"},
-        diagLogging: {skip: "does not return user data"},
         distinct: {
             setUp: function(mongosConn) {
                 assert.writeOK(mongosConn.getCollection(nss).insert({x: 1}));
diff --git a/jstests/sharding/safe_secondary_reads_single_migration_suspend_range_deletion.js b/jstests/sharding/safe_secondary_reads_single_migration_suspend_range_deletion.js
index 44ac466c435..ccb774e5f8f 100644
--- a/jstests/sharding/safe_secondary_reads_single_migration_suspend_range_deletion.js
+++ b/jstests/sharding/safe_secondary_reads_single_migration_suspend_range_deletion.js
@@ -151,7 +151,6 @@
         dbHash: {skip: "does not return user data"},
         dbStats: {skip: "does not return user data"},
         delete: {skip: "primary only"},
-        diagLogging: {skip: "does not return user data"},
         distinct: {
             setUp: function(mongosConn) {
                 assert.writeOK(mongosConn.getCollection(nss).insert({x: 1}));
diff --git a/jstests/sharding/safe_secondary_reads_single_migration_waitForDelete.js b/jstests/sharding/safe_secondary_reads_single_migration_waitForDelete.js
index bf09aebe9f5..98713affc78 100644
--- a/jstests/sharding/safe_secondary_reads_single_migration_waitForDelete.js
+++ b/jstests/sharding/safe_secondary_reads_single_migration_waitForDelete.js
@@ -134,7 +134,6 @@
         dbHash: {skip: "does not return user data"},
         dbStats: {skip: "does not return user data"},
         delete: {skip: "primary only"},
-        diagLogging: {skip: "does not return user data"},
         distinct: {
             setUp: function(mongosConn) {
                 assert.writeOK(mongosConn.getCollection(nss).insert({x: 1}));
diff --git a/src/mongo/db/SConscript b/src/mongo/db/SConscript
index e63c3b20742..cf2b8e6cd7f 100644
--- a/src/mongo/db/SConscript
+++ b/src/mongo/db/SConscript
@@ -413,7 +413,6 @@ env.Library(
     ],
     LIBDEPS=[
         '$BUILD_DIR/mongo/db/storage/mmap_v1/mmap_v1_options',
-        'diag_log',
         'repl/repl_settings',
         'server_options',
         'storage/storage_options',
@@ -592,7 +591,6 @@ env.Library(
         'concurrency/lock_manager',
         'curop',
         'curop_metrics',
-        'diag_log',
         'lasterror',
         'ops/write_ops_parsers',
         'rw_concern_d',
@@ -757,16 +755,6 @@ env.Library(
 )
 
 env.Library(
-    target="diag_log",
-    source=[
-        "diag_log.cpp",
-    ],
-    LIBDEPS=[
-        "storage/storage_options",
-    ],
-)
-
-env.Library(
     target="authz_manager_external_state_factory_d",
     source=[
         "authz_manager_external_state_factory_d.cpp",
@@ -818,7 +806,6 @@ env.Library(
         "db_raii",
         "dbdirectclient",
         "dbhelpers",
-        "diag_log",
         "exec/exec",
         "exec/working_set",
         "ftdc/ftdc_mongod",
diff --git a/src/mongo/db/auth/action_types.txt b/src/mongo/db/auth/action_types.txt
index 2fdb27bbeb0..1f57ba6084b 100644
--- a/src/mongo/db/auth/action_types.txt
+++ b/src/mongo/db/auth/action_types.txt
@@ -34,7 +34,6 @@
 "createUser",
 "dbHash",
 "dbStats",
-"diagLogging",
 "dropAllRolesFromDatabase",  # Not used for permissions checks, but to id the event in logs.
 "dropAllUsersFromDatabase",  # Not used for permissions checks, but to id the event in logs.
 "dropCollection",
diff --git a/src/mongo/db/auth/role_graph_builtin_roles.cpp b/src/mongo/db/auth/role_graph_builtin_roles.cpp
index d79149c368d..47ba56ce752 100644
--- a/src/mongo/db/auth/role_graph_builtin_roles.cpp
+++ b/src/mongo/db/auth/role_graph_builtin_roles.cpp
@@ -213,7 +213,6 @@ MONGO_INITIALIZER(AuthorizationBuiltinRoles)(InitializerContext* context) {
         << ActionType::shutdown
         << ActionType::touch
         << ActionType::unlock
-        << ActionType::diagLogging
         << ActionType::flushRouterConfig  // clusterManager gets this also
         << ActionType::fsync
         << ActionType::invalidateUserCache // userAdminAnyDatabase gets this also
diff --git a/src/mongo/db/commands/dbcommands.cpp b/src/mongo/db/commands/dbcommands.cpp
index 791d851c376..15851760bc5 100644
--- a/src/mongo/db/commands/dbcommands.cpp
+++ b/src/mongo/db/commands/dbcommands.cpp
@@ -64,7 +64,6 @@
 #include "mongo/db/db_raii.h"
 #include "mongo/db/dbdirectclient.h"
 #include "mongo/db/dbhelpers.h"
-#include "mongo/db/diag_log.h"
 #include "mongo/db/exec/working_set_common.h"
 #include "mongo/db/index/index_access_method.h"
 #include "mongo/db/index/index_descriptor.h"
@@ -391,64 +390,6 @@ public:
 
 } cmdProfile;
 
-class CmdDiagLogging : public BasicCommand {
-public:
-    virtual bool slaveOk() const {
-        return true;
-    }
-    CmdDiagLogging() : BasicCommand("diagLogging") {}
-    bool adminOnly() const {
-        return true;
-    }
-
-    void help(stringstream& h) const {
-        h << "http://dochub.mongodb.org/core/"
-             "monitoring#MonitoringandDiagnostics-DatabaseRecord%2FReplay%28diagLoggingcommand%29";
-    }
-
-
-    virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
-        return false;
-    }
-
-    virtual void addRequiredPrivileges(const std::string& dbname,
-                                       const BSONObj& cmdObj,
-                                       std::vector<Privilege>* out) {
-        ActionSet actions;
-        actions.addAction(ActionType::diagLogging);
-        out->push_back(Privilege(ResourcePattern::forClusterResource(), actions));
-    }
-
-    bool run(OperationContext* opCtx,
-             const string& dbname,
-             const BSONObj& cmdObj,
-             BSONObjBuilder& result) {
-        const char* deprecationWarning =
-            "CMD diagLogging is deprecated and will be removed in a future release";
-        warning() << deprecationWarning << startupWarningsLog;
-
-        // This doesn't look like it requires exclusive DB lock, because it uses its own diag
-        // locking, but originally the lock was set to be WRITE, so preserving the behaviour.
-        Lock::DBLock dbXLock(opCtx, dbname, MODE_X);
-
-        // TODO (Kal): OldClientContext legacy, needs to be removed
-        {
-            CurOp::get(opCtx)->ensureStarted();
-            stdx::lock_guard<Client> lk(*opCtx->getClient());
-            CurOp::get(opCtx)->setNS_inlock(dbname);
-        }
-
-        int was = _diaglog.setLevel(cmdObj.firstElement().numberInt());
-        _diaglog.flush();
-        if (!serverGlobalParams.quiet.load()) {
-            LOG(0) << "CMD: diagLogging set to " << _diaglog.getLevel() << " from: " << was;
-        }
-        result.append("was", was);
-        result.append("note", deprecationWarning);
-        return true;
-    }
-} cmddiaglogging;
-
 /* drop collection */
 class CmdDrop : public ErrmsgCommandDeprecated {
 public:
diff --git a/src/mongo/db/db.cpp b/src/mongo/db/db.cpp
index 7bef30a8593..ef1e073e1db 100644
--- a/src/mongo/db/db.cpp
+++ b/src/mongo/db/db.cpp
@@ -65,7 +65,6 @@
 #include "mongo/db/dbdirectclient.h"
 #include "mongo/db/dbhelpers.h"
 #include "mongo/db/dbmessage.h"
-#include "mongo/db/diag_log.h"
 #include "mongo/db/exec/working_set_common.h"
 #include "mongo/db/ftdc/ftdc_mongod.h"
 #include "mongo/db/index_names.h"
@@ -1013,9 +1012,6 @@ void shutdownTask() {
     log(LogComponent::kNetwork) << "shutdown: going to close listening sockets...";
     ListeningSockets::get()->closeAll();
 
-    log(LogComponent::kNetwork) << "shutdown: going to flush diaglog...";
-    _diaglog.flush();
-
     if (serviceContext->getGlobalStorageEngine()) {
         ServiceContext::UniqueOperationContext uniqueOpCtx;
         OperationContext* opCtx = client->getOperationContext();
diff --git a/src/mongo/db/diag_log.cpp b/src/mongo/db/diag_log.cpp
deleted file mode 100644
index 9b4606d478f..00000000000
--- a/src/mongo/db/diag_log.cpp
+++ /dev/null
@@ -1,109 +0,0 @@
-/**
- *    Copyright (C) 2008-2014 MongoDB Inc.
- *
- *    This program is free software: you can redistribute it and/or  modify
- *    it under the terms of the GNU Affero General Public License, version 3,
- *    as published by the Free Software Foundation.
- *
- *    This program is distributed in the hope that it will be useful,
- *    but WITHOUT ANY WARRANTY; without even the implied warranty of
- *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *    GNU Affero General Public License for more details.
- *
- *    You should have received a copy of the GNU Affero General Public License
- *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- *    As a special exception, the copyright holders give permission to link the
- *    code of portions of this program with the OpenSSL library under certain
- *    conditions as described in each individual source file and distribute
- *    linked combinations including the program with the OpenSSL library. You
- *    must comply with the GNU Affero General Public License in all respects for
- *    all of the code used other than as permitted herein. If you modify file(s)
- *    with this exception, you may extend this exception to your version of the
- *    file(s), but you are not obligated to do so. If you do not wish to do so,
- *    delete this exception statement from your version. If you delete this
- *    exception statement from all source files in the program, then also delete
- *    it in the license file.
- */
-
-#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kDefault;
-
-#include "mongo/platform/basic.h"
-
-#include <fstream>
-#include <iomanip>
-#include <sstream>
-
-#include "mongo/db/diag_log.h"
-
-#include "mongo/db/storage/storage_options.h"
-#include "mongo/util/assert_util.h"
-#include "mongo/util/log.h"
-
-namespace mongo {
-
-using std::hex;
-using std::ios;
-using std::ofstream;
-using std::string;
-using std::stringstream;
-
-DiagLog::DiagLog() : f(0), level(0) {}
-
-void DiagLog::openFile() {
-    verify(f == 0);
-    stringstream ss;
-    ss << storageGlobalParams.dbpath << "/diaglog." << hex << time(0);
-    string name = ss.str();
-    f = new ofstream(name.c_str(), ios::out | ios::binary);
-    if (!f->good()) {
-        str::stream msg;
-        msg << "diagLogging couldn't open " << name;
-        log() << msg.ss.str();
-        uasserted(ErrorCodes::FileStreamFailed, msg.ss.str());
-    } else {
-        log() << "diagLogging using file " << name;
-    }
-}
-
-int DiagLog::setLevel(int newLevel) {
-    stdx::lock_guard<stdx::mutex> lk(mutex);
-    int old = level;
-    log() << "diagLogging level=" << newLevel;
-    if (f == 0) {
-        openFile();
-    }
-    level = newLevel;  // must be done AFTER f is set
-    return old;
-}
-
-void DiagLog::flush() {
-    if (level) {
-        log() << "flushing diag log";
-        stdx::lock_guard<stdx::mutex> lk(mutex);
-        f->flush();
-    }
-}
-
-void DiagLog::writeop(char* data, int len) {
-    if (level & 1) {
-        stdx::lock_guard<stdx::mutex> lk(mutex);
-        f->write(data, len);
-    }
-}
-
-void DiagLog::readop(char* data, int len) {
-    if (level & 2) {
-        bool log = (level & 4) == 0;
-        OCCASIONALLY log = true;
-        if (log) {
-            stdx::lock_guard<stdx::mutex> lk(mutex);
-            verify(f);
-            f->write(data, len);
-        }
-    }
-}
-
-DiagLog _diaglog;
-
-}  // namespace mongo
diff --git a/src/mongo/db/diag_log.h b/src/mongo/db/diag_log.h
deleted file mode 100644
index 739f15aec43..00000000000
--- a/src/mongo/db/diag_log.h
+++ /dev/null
@@ -1,65 +0,0 @@
-/**
-*    Copyright (C) 2008 10gen Inc.
-*
-*    This program is free software: you can redistribute it and/or  modify
-*    it under the terms of the GNU Affero General Public License, version 3,
-*    as published by the Free Software Foundation.
-*
-*    This program is distributed in the hope that it will be useful,
-*    but WITHOUT ANY WARRANTY; without even the implied warranty of
-*    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-*    GNU Affero General Public License for more details.
-*
-*    You should have received a copy of the GNU Affero General Public License
-*    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*
-*    As a special exception, the copyright holders give permission to link the
-*    code of portions of this program with the OpenSSL library under certain
-*    conditions as described in each individual source file and distribute
-*    linked combinations including the program with the OpenSSL library. You
-*    must comply with the GNU Affero General Public License in all respects for
-*    all of the code used other than as permitted herein. If you modify file(s)
-*    with this exception, you may extend this exception to your version of the
-*    file(s), but you are not obligated to do so. If you do not wish to do so,
-*    delete this exception statement from your version. If you delete this
-*    exception statement from all source files in the program, then also delete
-*    it in the license file.
-*/
-
-#pragma once
-
-#include <iosfwd>
-
-#include "mongo/stdx/mutex.h"
-
-namespace mongo {
-
-/** a high level recording of operations to the database - sometimes used for diagnostics
-    and debugging.
-    */
-class DiagLog {
-    std::ofstream* f;  // note this is never freed
-                       /* 0 = off; 1 = writes, 2 = reads, 3 = both
-                          7 = log a few reads, and all writes.
-                       */
-    int level;
-    stdx::mutex mutex;
-    void openFile();
-
-public:
-    DiagLog();
-    int getLevel() const {
-        return level;
-    }
-    /**
-     * @return old
-     */
-    int setLevel(int newLevel);
-    void flush();
-    void writeop(char* data, int len);
-    void readop(char* data, int len);
-};
-
-extern DiagLog _diaglog;
-
-}  // namespace mongo
diff --git a/src/mongo/db/mongod_options.cpp b/src/mongo/db/mongod_options.cpp
index ae7407bbd6a..7e31a8f2890 100644
--- a/src/mongo/db/mongod_options.cpp
+++ b/src/mongo/db/mongod_options.cpp
@@ -40,7 +40,6 @@
 #include "mongo/bson/util/builder.h"
 #include "mongo/config.h"
 #include "mongo/db/db.h"
-#include "mongo/db/diag_log.h"
 #include "mongo/db/repl/repl_settings.h"
 #include "mongo/db/server_options.h"
 #include "mongo/db/server_options_helpers.h"
@@ -133,12 +132,6 @@ Status addMongodOptions(moe::OptionSection* options) {
     // Diagnostic Options
 
     general_options
-        .addOptionChaining(
-            "diaglog", "diaglog", moe::Int, "DEPRECATED: 0=off 1=W 2=R 3=both 7=W+some reads")
-        .hidden()
-        .setSources(moe::SourceAllLegacy);
-
-    general_options
         .addOptionChaining("operationProfiling.slowOpThresholdMs",
                            "slowms",
                            moe::Int,
@@ -1076,15 +1069,6 @@ Status storeMongodOptions(const moe::Environment& params) {
     if (params.count("storage.mmapv1.smallFiles")) {
         mmapv1GlobalOptions.smallfiles = params["storage.mmapv1.smallFiles"].as<bool>();
     }
-    if (params.count("diaglog")) {
-        warning() << "--diaglog is deprecated and will be removed in a future release"
-                  << startupWarningsLog;
-        int x = params["diaglog"].as<int>();
-        if (x < 0 || x > 7) {
-            return Status(ErrorCodes::BadValue, "can't interpret --diaglog setting");
-        }
-        _diaglog.setLevel(x);
-    }
 
     if ((params.count("storage.journal.enabled") &&
          params["storage.journal.enabled"].as<bool>() == true) &&
diff --git a/src/mongo/db/service_entry_point_mongod.cpp b/src/mongo/db/service_entry_point_mongod.cpp
index 1e24a469a1d..dfec6d0382b 100644
--- a/src/mongo/db/service_entry_point_mongod.cpp
+++ b/src/mongo/db/service_entry_point_mongod.cpp
@@ -44,7 +44,6 @@
 #include "mongo/db/curop_metrics.h"
 #include "mongo/db/cursor_manager.h"
 #include "mongo/db/dbdirectclient.h"
-#include "mongo/db/diag_log.h"
 #include "mongo/db/initialize_operation_session_info.h"
 #include "mongo/db/introspect.h"
 #include "mongo/db/jsobj.h"
@@ -107,18 +106,6 @@ const StringMap<int> cmdWhitelist = {{"delete", 1},
                                      {"refreshLogicalSessionCacheNow", 1},
                                      {"update", 1}};
 
-inline void opread(const Message& m) {
-    if (_diaglog.getLevel() & 2) {
-        _diaglog.readop(m.singleData().view2ptr(), m.header().getLen());
-    }
-}
-
-inline void opwrite(const Message& m) {
-    if (_diaglog.getLevel() & 1) {
-        _diaglog.writeop(m.singleData().view2ptr(), m.header().getLen());
-    }
-}
-
 void generateLegacyQueryErrorResponse(const AssertionException* exception,
                                       const QueryMessage& queryMessage,
                                       CurOp* curop,
@@ -1081,17 +1068,9 @@ DbResponse ServiceEntryPointMongod::handleRequest(OperationContext* opCtx, const
     if (op == dbQuery) {
         if (nsString.isCommand()) {
             isCommand = true;
-            opwrite(m);
-        } else {
-            opread(m);
         }
-    } else if (op == dbGetMore) {
-        opread(m);
     } else if (op == dbCommand || op == dbMsg) {
         isCommand = true;
-        opwrite(m);
-    } else {
-        opwrite(m);
     }
 
     CurOp& currentOp = *CurOp::get(opCtx);
diff --git a/src/mongo/db/storage/mmap_v1/SConscript b/src/mongo/db/storage/mmap_v1/SConscript
index a1642bc578a..0e308816953 100644
--- a/src/mongo/db/storage/mmap_v1/SConscript
+++ b/src/mongo/db/storage/mmap_v1/SConscript
@@ -69,7 +69,6 @@ env.Library(
         '$BUILD_DIR/mongo/db/commands',
         '$BUILD_DIR/mongo/db/commands/server_status',
         '$BUILD_DIR/mongo/db/concurrency/lock_manager',
-        '$BUILD_DIR/mongo/db/diag_log',
         '$BUILD_DIR/mongo/db/index_names',
         '$BUILD_DIR/mongo/db/index/index_descriptor',
         '$BUILD_DIR/mongo/db/storage/journal_listener',
diff --git a/src/mongo/db/storage/mmap_v1/data_file_sync.cpp b/src/mongo/db/storage/mmap_v1/data_file_sync.cpp
index ab7dca95ff9..4d895c09b20 100644
--- a/src/mongo/db/storage/mmap_v1/data_file_sync.cpp
+++ b/src/mongo/db/storage/mmap_v1/data_file_sync.cpp
@@ -34,7 +34,6 @@
 
 #include "mongo/db/client.h"
 #include "mongo/db/commands/server_status_metric.h"
-#include "mongo/db/diag_log.h"
 #include "mongo/db/operation_context.h"
 #include "mongo/db/service_context.h"
 #include "mongo/db/storage/mmap_v1/dur_journal.h"
@@ -66,7 +65,6 @@ void DataFileSync::run() {
     }
     int time_flushing = 0;
     while (!globalInShutdownDeprecated()) {
-        _diaglog.flush();
         if (storageGlobalParams.syncdelay == 0) {
             // in case at some point we add an option to change at runtime
             sleepsecs(5);