Support changing gRPC max message length (#327)

temporalio · May 11, 2021 · 8c457c6 · 8c457c6
1 parent 4022469
commit 8c457c6
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Showing 3 changed files with 8 additions and 1 deletion.
diff --git a/.vscode/launch.json b/.vscode/launch.json
@@ -10,7 +10,10 @@
       "runtimeArgs": ["run-script", "dev"],
       "runtimeExecutable": "npm",
       "skipFiles": ["<node_internals>/**"],
-      "type": "pwa-node"
+      "type": "pwa-node",
+      "env": {
+        "TEMPORAL_GRPC_MAX_MESSAGE_LENGTH": "6194304"
+      }
     },
     {
       "name": "Debug with mTLS",

diff --git a/README.md b/README.md
@@ -26,6 +26,7 @@ Set these environment variables if you need to change their defaults
 | TEMPORAL_HOT_RELOAD_TEST_PORT | HTTP port used by hot reloading in tests                          | 8082                          |
 | TEMPORAL_SESSION_SECRET       | Secret used to hash the session with HMAC                         | "ensure secret in production" |
 | TEMPORAL_EXTERNAL_SCRIPTS     | Additional JavaScript tags to serve in the UI                     |                               |
+| TEMPORAL_GRPC_MAX_MESSAGE_LENGTH | gRPC max message length (bytes)                                | 4194304 (4mb)                 |
 
 <details>
 <summary>

diff --git a/server/temporal-client/temporal-client.js b/server/temporal-client/temporal-client.js
@@ -44,6 +44,9 @@ function TemporalClient() {
 
   const { credentials: tlsCreds, options: tlsOpts } = getCredentials();
 
+  tlsOpts['grpc.max_receive_message_length'] =
+    Number(process.env.TEMPORAL_GRPC_MAX_MESSAGE_LENGTH) || 4 * 1024 * 1024;
+
   let client = new service.temporal.api.workflowservice.v1.WorkflowService(
     process.env.TEMPORAL_GRPC_ENDPOINT || '127.0.0.1:7233',
     tlsCreds,