[GitHub] [couchdb-nano] klues opened a new issue #269: Unhandled Promise Rejection on timeout of nano.db.compact()

[GitBox <gi...@apache.org>]

klues opened a new issue #269:
URL: https://github.com/apache/couchdb-nano/issues/269


   <!--- Provide a general summary of the issue in the Title above -->
   
   I'm using a script that should compact all my databases, looks like this:
   ```
   const nano = require('nano')({
       "url": dbUrl.trim(),
       "requestDefaults": {"timeout": 250000}
   });
   
   const dblist = await nano.db.list().catch(err => console.log(err));
   for (const dbName of dblist) {
       try {
           await nano.db.compact(dbName).catch(err => {
               console.log(err);
           });
       } catch (e) {
           console.log(e);
       }
   }
   ```
   see full script at: https://github.com/asterics/AsTeRICS-Grid/blob/master/scripts/couchDBCompact.js
   
   ## Expected Behavior
   I expect the code above to:
   * use a connection timeout of 250 seconds
   * finish cleanly also in the case of an error since I'm catching all exceptions/rejections
   
   ## Current Behavior
   * the script works for most databases
   * for some databases it fails with the following error after 60 seconds (so my default timeout doesn't seem to work):
   ```
   (node:84469) UnhandledPromiseRejectionWarning: Error: {error,timeout}
       at responseHandler (/<path>/node_modules/nano/lib/nano.js:175:20)
       at /<path>/node_modules/nano/lib/nano.js:405:13
       at runMicrotasks (<anonymous>)
       at processTicksAndRejections (internal/process/task_queues.js:97:5)
   ```
   
   ## Steps to Reproduce (for bugs)
   1. Download the script from https://github.com/asterics/AsTeRICS-Grid/blob/master/scripts/couchDBCompact.js
   2. run `node couchDBCompact.js http://admin:password@localhost:5984 compact` with the correct credentials of a locally running CouchDB instance 
   
   ## Your Environment
   <!--- Include as many relevant details about the environment you experienced the bug in -->
   * Version used: nano 9.0.3
   * CouchDB Version: 2.2.0
   


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[GitHub] [couchdb-nano] glynnbird closed issue #269: Unhandled Promise Rejection on timeout of nano.db.compact()

[GitBox <gi...@apache.org>]

glynnbird closed issue #269:
URL: https://github.com/apache/couchdb-nano/issues/269


   


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[GitHub] [couchdb-nano] glynnbird commented on issue #269: Unhandled Promise Rejection on timeout of nano.db.compact()

[GitBox <gi...@apache.org>]

glynnbird commented on issue #269:
URL: https://github.com/apache/couchdb-nano/issues/269#issuecomment-918203316


   I could not reproduce this with Nano 9.0.4 and CouchDB 3.1.
   
   You could try the `curl` equivalent:
   
   ```sh
   curl -v -X POST -H 'Content-type: application/json'  'http://localhost:5984/db/_compact'
   ```
   
   For it always returns instantaneously. 
   
   


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[GitHub] [couchdb-nano] klues commented on issue #269: Unhandled Promise Rejection on timeout of nano.db.compact()

[GitBox <gi...@apache.org>]

klues commented on issue #269:
URL: https://github.com/apache/couchdb-nano/issues/269#issuecomment-918964161


   Thanks for testing!
   After some more testing I think my problem were limited ressources on my server. While compacting I sometimes got the error `no db shards could be opened` and then like described above the node timeout error. I've experimented with increasing CouchDB params like [max_dbs_open](https://docs.couchdb.org/en/3.1.1/config/couchdb.html#couchdb/max_dbs_open) which made things even worse. Finally my solution was to simply slow down the process with an additional timeout like this:
   
   ```
   await nano.db.compact(dbName).catch(err => {
       console.log(err);
   });
   await new Promise(resolve => setTimeout(() => resolve(), 5000));
   ```


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