5f872f4a82
Sentry reported the following panic: ``` time="2023-11-01T01:33:56.220583478Z" level=error msg="Request panicked! goroutine 43763845 [running]: runtime/debug.Stack() runtime/debug/stack.go:24 +0x5e github.com/matrix-org/dendrite/internal/httputil.MakeExternalAPI.MakeJSONAPI.Protect.func3.1() github.com/matrix-org/util@v0.0.0-20221111132719-399730281e66/json.go:98 +0x13e panic({0x15b5540?, 0x2453560?}) runtime/panic.go:914 +0x21f github.com/matrix-org/dendrite/internal/httputil.MakeAuthAPI.func1.1() github.com/matrix-org/dendrite/internal/httputil/httpapi.go:91 +0x4a panic({0x15b5540?, 0x2453560?}) runtime/panic.go:914 +0x21f github.com/matrix-org/dendrite/roomserver/internal/query.(*Queryer).QueryNextRoomHierarchyPage(0x413185?, {0x1a576e0, 0xc0436705a0}, {{{0xc01e5fd260, 0x1f}, {0xc01e5fd261, 0x12}, {0xc01e5fd274, 0xb}}, {0xc145cb5200, ...}, ...}, ...) github.com/matrix-org/dendrite/roomserver/internal/query/query_room_hierarchy.go:116 +0xbfe github.com/matrix-org/dendrite/clientapi/routing.QueryRoomHierarchy(0xc0be13b200, 0xc144e65dd0, {0xc01e5fd260?, 0x6?}, {0x7faf140639c8, 0xc00059af20}, 0xc08adca000?) github.com/matrix-org/dendrite/clientapi/routing/room_hierarchy.go:141 +0x68b github.com/matrix-org/dendrite/clientapi/routing.Setup.func35(0xc03e7d5c20?, 0x17c3a57?) github.com/matrix-org/dendrite/clientapi/routing/routing.go:534 +0xbe github.com/matrix-org/dendrite/internal/httputil.MakeAuthAPI.func1(0xc0bd097300) github.com/matrix-org/dendrite/internal/httputil/httpapi.go:108 +0x5ed github.com/matrix-org/util.(*jsonRequestHandlerWrapper).OnIncomingRequest(0xc0bd097200?, 0xc13b7d6fc0?) github.com/matrix-org/util@v0.0.0-20221111132719-399730281e66/json.go:79 +0x19 github.com/matrix-org/dendrite/internal/httputil.MakeExternalAPI.MakeJSONAPI.func2({0x1a54880, 0xc138f28b60}, 0xc0bd097200?) github.com/matrix-org/util@v0.0.0-20221111132719-399730281e66/json.go:141 +0xaa github.com/matrix-org/dendrite/internal/httputil.MakeExternalAPI.MakeJSONAPI.Protect.func3({0x1a54880?, 0xc138f28b60?}, 0x17c01d9?) github.com/matrix-org/util@v0.0.0-20221111132719-399730281e66/json.go:103 +0x63 net/http.HandlerFunc.ServeHTTP(...) net/http/server.go:2136 github.com/matrix-org/dendrite/internal/httputil.MakeExternalAPI.func1({0x1a54880?, 0xc138f28b60?}, 0xc0bd097100) github.com/matrix-org/dendrite/internal/httputil/httpapi.go:191 +0x411 net/http.HandlerFunc.ServeHTTP(0xc0bd097000?, {0x1a54880?, 0xc138f28b60?}, 0xbe1348905308878e?) net/http/server.go:2136 +0x29 github.com/gorilla/mux.(*Router).ServeHTTP(0xc000000000, {0x1a54880, 0xc138f28b60}, 0xc0bd096f00) github.com/gorilla/mux@v1.8.0/mux.go:210 +0x1c5 github.com/matrix-org/dendrite/setup/base.SetupAndServeHTTP.(*Handler).Handle.(*Handler).handle.func5({0x1a54880, 0xc138f28b60}, 0xc0bd096e00) github.com/getsentry/sentry-go@v0.14.0/http/sentryhttp.go:103 +0x298 net/http.HandlerFunc.ServeHTTP(0xc0bd096a00?, {0x1a54880?, 0xc138f28b60?}, 0x7fae6812f5d0?) net/http/server.go:2136 +0x29 github.com/gorilla/mux.(*Router).ServeHTTP(0xc000000a80, {0x1a54880, 0xc138f28b60}, 0xc0bd096900) github.com/gorilla/mux@v1.8.0/mux.go:210 +0x1c5 net/http.serverHandler.ServeHTTP({0xc02884c4e0?}, {0x1a54880?, 0xc138f28b60?}, 0x6?) net/http/server.go:2938 +0x8e net/http.(*conn).serve(0xc1926922d0, {0x1a576e0, 0xc024a6ec90}) net/http/server.go:2009 +0x5f4 created by net/http.(*Server).Serve in goroutine 16979 net/http/server.go:3086 +0x5cb " context=missing panic="runtime error: invalid memory address or nil pointer dereference" ``` [skip ci] |
||
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.. | ||
acls | ||
api | ||
auth | ||
internal | ||
producers | ||
state | ||
storage | ||
types | ||
version | ||
README.md | ||
roomserver_test.go | ||
roomserver.go |
RoomServer
RoomServer Internals
Numeric IDs
To save space matrix string identifiers are mapped to local numeric IDs. The numeric IDs are more efficient to manipulate and use less space to store. The numeric IDs are never exposed in the API the room server exposes. The numeric IDs are converted to string IDs before they leave the room server. The numeric ID for a string ID is never 0 to avoid being confused with go's default zero value. Zero is used to indicate that there was no corresponding string ID. Well-known event types and event state keys are preassigned numeric IDs.
State Snapshot Storage
The room server stores the state of the matrix room at each event. For efficiency the state is stored as blocks of 3-tuples of numeric IDs for the event type, event state key and event ID. For further efficiency the state snapshots are stored as the combination of up to 64 these blocks. This allows blocks of the room state to be reused in multiple snapshots.
The resulting database tables look something like this:
+-------------------------------------------------------------------+
| Events |
+---------+-------------------+------------------+------------------+
| EventNID| EventTypeNID | EventStateKeyNID | StateSnapshotNID |
+---------+-------------------+------------------+------------------+
| 1 | m.room.create 1 | "" 1 | <nil> 0 |
| 2 | m.room.member 2 | "@user:foo" 2 | <nil> 0 |
| 3 | m.room.member 2 | "@user:bar" 3 | {1,2} 1 |
| 4 | m.room.message 3 | <nil> 0 | {1,2,3} 2 |
| 5 | m.room.member 2 | "@user:foo" 2 | {1,2,3} 2 |
| 6 | m.room.message 3 | <nil> 0 | {1,3,6} 3 |
+---------+-------------------+------------------+------------------+
+----------------------------------------+
| State Snapshots |
+-----------------------+----------------+
| EventStateSnapshotNID | StateBlockNIDs |
+-----------------------+----------------|
| 1 | {1} |
| 2 | {1,2} |
| 3 | {1,2,3} |
+-----------------------+----------------+
+-----------------------------------------------------------------+
| State Blocks |
+---------------+-------------------+------------------+----------+
| StateBlockNID | EventTypeNID | EventStateKeyNID | EventNID |
+---------------+-------------------+------------------+----------+
| 1 | m.room.create 1 | "" 1 | 1 |
| 1 | m.room.member 2 | "@user:foo" 2 | 2 |
| 2 | m.room.member 2 | "@user:bar" 3 | 3 |
| 3 | m.room.member 2 | "@user:foo" 2 | 6 |
+---------------+-------------------+------------------+----------+