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How to Fix CloudFlare Error 1101 (Worker threw exception)?
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How to Fix CloudFlare Error 1101 (Worker threw exception)?

August 13, 2020 No Comments cloud, cloud computing, cloudflare, CloudFlare, javascript

After the update to the Load Balancer Node https://steem.justyy.workers.dev a few days ago, I started to notice the `scriptThrewException` error

scriptThrewException

Number of Errors 6
Number of Requests 6
Number of Sub Requests 42
CPU Time P50 (ms) 2.11
CPU Time P90 (ms) 3.37
CPU Time P99 (ms) 3.8
CPU Time P99.9 (ms) 3.85

After investigation, I found out it is due to Error 1101 thrown by CloudFlare Worker.

cloudflare-1101-error-worker-threw-exception How to Fix CloudFlare Error 1101 (Worker threw exception)? cloud cloud computing cloudflare CloudFlare javascript

This usually happens, when the script throws a Javascript exception, and can be handled by Try-Catch.

Further investigation shows that the error is caused by a rejection in a Promise, which is not handled. Thus, changing to the following (error happens when sending API to RPC node to Get the Version of the Steem Blockchain RPC Node)

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  let version = "";
  try {
    version = await getVersion(server);
  } catch (e) {
    version = JSON.stringify(e);
  }
  let version = "";
  try {
    version = await getVersion(server);
  } catch (e) {
    version = JSON.stringify(e);
  }

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