Container creation error: You should always set the Memory limit when using Memoryswap limit

[samikrc]

I am trying to run the fn java example on WSL2 (Ubuntu 22.04) with docker engine, and getting the following error when I try to invoke the function.

The client shows:

$ fn invoke java-app javafn
Error invoking function. status: 500 message: internal server error

The server debug log shows:

time="2024-12-12T06:34:20Z" level=debug msg="docker inspect image" app_id=01JEVG6929NG8G00GZJ0000003 call_id=01JEWS6MMKNG8G00GZJ0000002 container_id=01JEWS6MMKNG8G00GZJ0000002 cpus= fn_id=01JEVGHBEVNG8G00GZJ0000004 idle_timeout=30 image="fn_local_registry/javafn:0.0.2" memory=1024 stack=ValidateImage
time="2024-12-12T06:34:20Z" level=debug msg="docker create container" app_id=01JEVG6929NG8G00GZJ0000003 call_id=01JEWS6MMKNG8G00GZJ0000002 container_id=01JEWS6MMKNG8G00GZJ0000002 cpus= fn_id=01JEVGHBEVNG8G00GZJ0000004 idle_timeout=30 image="fn_local_registry/javafn:0.0.2" memory=1024 stack=CreateContainer
time="2024-12-12T06:34:20Z" level=error msg="Could not create container" app_id=01JEVG6929NG8G00GZJ0000003 container_id=01JEWS6MMKNG8G00GZJ0000002 cpus= error="API error (400): You should always set the Memory limit when using Memoryswap limit, see usage" fn_id=01JEVGHBEVNG8G00GZJ0000004 idle_timeout=30 image="fn_local_registry/javafn:0.0.2" memory=1024 stack=CreateContainer
time="2024-12-12T06:34:20Z" level=info msg="hot function failure" app_id=01JEVG6929NG8G00GZJ0000003 container_id=01JEWS6MMKNG8G00GZJ0000002 cpus= error="API error (400): You should always set the Memory limit when using Memoryswap limit, see usage" fn_id=01JEVGHBEVNG8G00GZJ0000004 idle_timeout=30 image="fn_local_registry/javafn:0.0.2" memory=1024
time="2024-12-12T06:34:20Z" level=info msg="hot function failure" app_id=01JEVG6929NG8G00GZJ0000003 container_id=01JEWS6MMKNG8G00GZJ0000002 cpus= error="Container failed to initialize, please ensure you are using the latest fdk and check the logs" fn_id=01JEVGHBEVNG8G00GZJ0000004 idle_timeout=30 image="fn_local_registry/javafn:0.0.2" memory=1024
time="2024-12-12T06:34:20Z" level=info msg="container wait error, sending error to client" action="server.handleFnInvokeCall)-fm" app_id=01JEVG6929NG8G00GZJ0000003 call_id=01JEWS6MMHNG8G00GZJ0000001 error="API error (400): You should always set the Memory limit when using Memoryswap limit, see usage" fn_id=01JEVGHBEVNG8G00GZJ0000004
time="2024-12-12T06:34:20Z" level=error msg="internal server error" action="server.handleFnInvokeCall)-fm" error="API error (400): You should always set the Memory limit when using Memoryswap limit, see usage" fn_id=01JEVGHBEVNG8G00GZJ0000004 stack="goroutine 27 [running]:
runtime/debug.Stack(0xc4201502a0, 0x10852c0, 0xc4204be460)
        /usr/local/go/src/runtime/debug/stack.go:24 +0xa7
github.com/fnproject/fn/api/server.HandleErrorResponse(0x10902a0, 0xc42041ccf0, 0x7f749e2eed40, 0xc4200ee2c0, 0x10852c0, 0xc4204be460)
        /go/src/github.com/fnproject/fn/api/server/error_response.go:57 +0x57f
github.com/fnproject/fn/api/server.handleErrorResponse(0xc4200ee2c0, 0x10852c0, 0xc4204be460)
        /go/src/github.com/fnproject/fn/api/server/error_response.go:25 +0xa9
github.com/fnproject/fn/api/server.(*Server).handleFnInvokeCall(0xc4204c00e0, 0xc4200ee2c0)
        /go/src/github.com/fnproject/fn/api/server/runner_fninvoke.go:53 +0x1da
github.com/fnproject/fn/api/server.(*Server).(github.com/fnproject/fn/api/server.handleFnInvokeCall)-fm(0xc4200ee2c0)
        /go/src/github.com/fnproject/fn/api/server/server.go:1022 +0x34
github.com/fnproject/fn/vendor/github.com/gin-gonic/gin.(*Context).Next(0xc4200ee2c0)
        /go/src/github.com/fnproject/fn/vendor/github.com/gin-gonic/gin/context.go:108 +0x43
github.com/fnproject/fn/api/server.(*Server).runMiddleware(0xc4204c00e0, 0xc4200ee2c0, 0x0, 0x0, 0x0)
        /go/src/github.com/fnproject/fn/api/server/middleware.go:42 +0x29f
github.com/fnproject/fn/api/server.(*Server).rootMiddlewareWrapper.func1(0xc4200ee2c0)
        /go/src/github.com/fnproject/fn/api/server/middleware.go:32 +0x52
github.com/fnproject/fn/vendor/github.com/gin-gonic/gin.(*Context).Next(0xc4200ee2c0)
        /go/src/github.com/fnproject/fn/vendor/github.com/gin-gonic/gin/context.go:108 +0x43
github.com/fnproject/fn/api/server.panicWrap(0xc4200ee2c0)
        /go/src/github.com/fnproject/fn/api/server/gin_middlewares.go:197 +0x51
github.com/fnproject/fn/vendor/github.com/gin-gonic/gin.(*Context).Next(0xc4200ee2c0)
        /go/src/github.com/fnproject/fn/vendor/github.com/gin-gonic/gin/context.go:108 +0x43
github.com/fnproject/fn/api/server.panicWrap(0xc4200ee2c0)
        /go/src/github.com/fnproject/fn/api/server/gin_middlewares.go:197 +0x51
github.com/fnproject/fn/vendor/github.com/gin-gonic/gin.(*Context).Next(0xc4200ee2c0)
        /go/src/github.com/fnproject/fn/vendor/github.com/gin-gonic/gin/context.go:108 +0x43
github.com/fnproject/fn/api/server.apiMetricsWrap.func1.1(0xc4200ee2c0)
        /go/src/github.com/fnproject/fn/api/server/gin_middlewares.go:158 +0x316
github.com/fnproject/fn/vendor/github.com/gin-gonic/gin.(*Context).Next(0xc4200ee2c0)
        /go/src/github.com/fnproject/fn/vendor/github.com/gin-gonic/gin/context.go:108 +0x43
github.com/fnproject/fn/api/server.traceWrap(0xc4200ee2c0)
        /go/src/github.com/fnproject/fn/api/server/gin_middlewares.go:101 +0x5ae
github.com/fnproject/fn/vendor/github.com/gin-gonic/gin.(*Context).Next(0xc4200ee2c0)
        /go/src/github.com/fnproject/fn/vendor/github.com/gin-gonic/gin/context.go:108 +0x43
github.com/fnproject/fn/api/server.loggerWrap(0xc4200ee2c0)
        /go/src/github.com/fnproject/fn/api/server/gin_middlewares.go:214 +0x18e
github.com/fnproject/fn/vendor/github.com/gin-gonic/gin.(*Context).Next(0xc4200ee2c0)
        /go/src/github.com/fnproject/fn/vendor/github.com/gin-gonic/gin/context.go:108 +0x43
github.com/fnproject/fn/vendor/github.com/gin-gonic/gin.(*Engine).handleHTTPRequest(0xc4204865a0, 0xc4200ee2c0)
        /go/src/github.com/fnproject/fn/vendor/github.com/gin-gonic/gin/gin.go:361 +0x586
github.com/fnproject/fn/vendor/github.com/gin-gonic/gin.(*Engine).ServeHTTP(0xc4204865a0, 0x108fbe0, 0xc42041a7d0, 0xc420014100)
        /go/src/github.com/fnproject/fn/vendor/github.com/gin-gonic/gin/gin.go:326 +0x153
github.com/fnproject/fn/vendor/go.opencensus.io/plugin/ochttp.(*Handler).ServeHTTP(0xc4202080f0, 0x108fbe0, 0xc42041a7d0, 0xc420152c00)
        /go/src/github.com/fnproject/fn/vendor/go.opencensus.io/plugin/ochttp/server.go:86 +0x1c8
net/http.serverHandler.ServeHTTP(0xc42046e8f0, 0x108ea60, 0xc420010000, 0xc420152c00)
        /usr/local/go/src/net/http/server.go:2697 +0xbc
net/http.(*conn).serve(0xc420438000, 0x10901e0, 0xc4201c65c0)
        /usr/local/go/src/net/http/server.go:1830 +0x651
created by net/http.(*Server).Serve
        /usr/local/go/src/net/http/server.go:2798 +0x27b

I have seen this error around a few places on the net, but have not seen any solution so far. By looking at the error message and the code, the closest I have come to is that the error comes from line# 491 in https://github.com/fnproject/fn/blob/master/api/agent/drivers/docker/cookie.go, in the CreateContainer function. Any pointers on how to solve this?

[gontaneko53]

This issue appears to occur with Docker engine version 27.x. Version 26.0 did not have the issue.

[samikrc]

@gontaneko53 Thanks - I will try downgrading and check again.

Edit: reporting back - downgrading to 26.x.y does seem to work. Might be a docker engine issue then.