unexpected errors that abort/kill action

[tripodsan]

from the logs:

{"level":"error",
"ow":{
"activationId":"26fabd23482a4acfbabd23482a4acfab",
"actionName":"/helix/helix-services-private/dispatch@3.0.4",
"transactionId":"Q5O7y82ufKQeOjM6hRHJ87xRDga1aWEH"},
"message":"POST https://runtime.adobe.io/api/v1/namespaces/helix-pages/actions/08c7b7b4de6bcd21fb950e4f16d1257fa3500928/hlx--static?blocking=true Returned HTTP 502 (Bad Gateway) --> \"The action did not produce a valid response and exited unexpectedly.\"","
timestamp":"2020-01-19T22:12:39.573248309Z"}

 wsk activation get "90937576109e4312937576109ec31261"
ok: got activation 90937576109e4312937576109ec31261
{
    "namespace": "helix-pages",
    "name": "static@1.5.42",
    "version": "0.0.1",
    "subject": "helix-pages",
    "activationId": "90937576109e4312937576109ec31261",
    "cause": "f3644ac3b1d14f32a44ac3b1d16f328d",
    "start": 1579471850119,
    "end": 1579471851723,
    "duration": 1604,
    "statusCode": 0,
    "response": {
        "status": "action developer error",
        "statusCode": 0,
        "success": false,
        "result": {
            "error": "The action did not produce a valid response and exited unexpectedly."
        }
    },
    "logs": [],
    "annotations": [
        {
            "key": "causedBy",
            "value": "sequence"
        },
        {
            "key": "path",
            "value": "helix/helix-services-private/static@1.5.42"
        },
        {
            "key": "kind",
            "value": "nodejs:10"
        },
        {
            "key": "timeout",
            "value": false
        },
        {
            "key": "limits",
            "value": {
                "concurrency": 200,
                "logs": 10,
                "memory": 256,
                "timeout": 60000
            }
        }
    ],
    "publish": false
}
$ wsk activation logs "90937576109e4312937576109ec31261"
2020-01-19T22:10:50.328Z       stderr: instrumenting epsagon.
2020-01-19T22:10:50.333Z       stderr: deliverStatic with adobe/helix-pages/21299f6930cc5c1dab371adb7cc40f53ed8f77eb path=/404.html file=/404.html allow=undefined deny=undefined root=/htdocs esi=false
2020-01-19T22:10:50.334Z       stderr: deliverPlain: url=https://raw.githubusercontent.com/adobe/helix-pages/21299f6930cc5c1dab371adb7cc40f53ed8f77eb/htdocs/404.html

[tripodsan]

probably some filehandles and memory leaks:

[tripodsan]

the action is probably killed due to a OOME, most likely caused by the epsagon client. see #158 (comment)

closing this for now, continue in #158