bageren•10mo ago

TypeError [ERR_STREAM_NULL_VALUES]: May not write null values to stream

Our production server has started crashing frequently because of this error. At this point, we have to seriously consider moving back to Node, unless someone here can help. This is all the details we get when the error is thrown:

TypeError [ERR_STREAM_NULL_VALUES]: May not write null values to stream
    at _write (ext:deno_node/_stream.mjs:3869:15)
    at Socket.Writable.write (ext:deno_node/_stream.mjs:3904:14)
    at nextWrite (file:///deno-dir/npm/registry.npmjs.org/postgres/3.4.3/src/connection.js:250:22)
    at eventLoopTick (ext:core/01_core.js:203:13)

We are using Deno 1.45.2. I'd be happy to provide more details - just not sure what's relevant.

11 Replies

marvinh.•10mo ago

That looks like a bug. Is it possible to create a reproduction case out of this? Like a snippet that is able to reproduce the error on its own?

bagerenOP•10mo ago

Unfortunately I've not been able to find a way to reproduce it. All I know is that our E2E tests can't go all the way through without it happening. :/

Rowin•18h ago

Just ran into this too:

error: Uncaught TypeError: May not write null values to stream
    at _write (ext:deno_node/internal/streams/writable.js:501:11)
    at Socket.Writable.write (ext:deno_node/internal/streams/writable.js:555:10)
    at nextWrite (file:///C:/Users/User/AppData/Local/deno/npm/registry.npmjs.org/postgres/3.4.5/src/connection.js:250:22)
    at ext:deno_web/02_timers.js:35:14
    at eventLoopTick (ext:core/01_core.js:213:13)

error: Uncaught TypeError: May not write null values to stream
    at _write (ext:deno_node/internal/streams/writable.js:501:11)
    at Socket.Writable.write (ext:deno_node/internal/streams/writable.js:555:10)
    at nextWrite (file:///C:/Users/User/AppData/Local/deno/npm/registry.npmjs.org/postgres/3.4.5/src/connection.js:250:22)
    at ext:deno_web/02_timers.js:35:14
    at eventLoopTick (ext:core/01_core.js:213:13)

All I'm doing is a SELECT Works fine when I curl the endpoint, happens sometimes when I spam the endpoint with wrk @bageren what did you end up doing? @marvinh. I am able to reproduce it:

import postgres from "postgres";

const psql = postgres();

Deno.serve({ hostname: "0.0.0.0", port: 8080 }, async () => {
  await psql`select * from information_schema.tables limit 1`;
  return new Response("Hello!");
});

import postgres from "postgres";

const psql = postgres();

Deno.serve({ hostname: "0.0.0.0", port: 8080 }, async () => {
  await psql`select * from information_schema.tables limit 1`;
  return new Response("Hello!");
});

Run with: while true; do timeout 2 deno run -A index.ts; done Then run a couple instances of wrk like this: while true; do timeout -s 9 2 wrk http://127.0.0.1:8080/ -t1 -c256; done

Rowin•18h ago

Rowin•18h ago

Running the server on Windows Postgres with Docker Desktop wrk with WSL

marvinh.•18h ago

@Rowin Nice, perfect! Let's create an issue out of that https://github.com/denoland/deno/issues

Rowin•17h ago

Will do. Why are these both "CLI"?

marvinh.•17h ago

We usually make the distinction between Deno the CLI and Deno Deploy. In the past many users reported Deno Deploy issues in that tracker

Rowin•17h ago

Ah so CLI = runtime too?

marvinh.•17h ago

yeah

bagerenOP•13h ago

@Rowin migrated to Node, issue disappeared after that

TypeError [ERR_STREAM_NULL_VALUES]: May not write null values to stream

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