MaxListenersExceededWarning: Possible EventEmitter memory leak detected #3877
Description
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Environment (please complete the following information):
- WebdriverIO version: 5.7.14
- Mode: WDIO Testrunner
- If WDIO Testrunner, running sync/async: sync
- Node.js version: 10.9.0
- NPM version: 6.2.0
- Browser name and version: Chrome 74
- Platform name and version: Windows NT 10
- Additional wdio packages used (if applicable):
@wdio/junit-reporter,
@wdio/cli,
@wdio/mocha-framework,
@wdio/local-runner,
@wdio/spec-reporter,
@wdio/sync
Describe the bug
During my CI build I'm seeing this happen. The build continues as normal after this
(node:4488) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 end listeners added. Use emitter.setMaxListeners() to increase limit
(node:4488) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 unpipe listeners added. Use emitter.setMaxListeners() to increase limit
(node:4488) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 drain listeners added. Use emitter.setMaxListeners() to increase limit
(node:4488) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 error listeners added. Use emitter.setMaxListeners() to increase limit
(node:4488) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added. Use emitter.setMaxListeners() to increase limit
(node:4488) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 finish listeners added. Use emitter.setMaxListeners() to increase limit
(node:4488) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 unpipe listeners added. Use emitter.setMaxListeners() to increase limit
(node:4488) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 drain listeners added. Use emitter.setMaxListeners() to increase limit
(node:4488) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 error listeners added. Use emitter.setMaxListeners() to increase limit
(node:4488) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added. Use emitter.setMaxListeners() to increase limit
(node:4488) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 finish listeners added. Use emitter.setMaxListeners() to increase limit
To Reproduce
Not really sure, I'm only seeing it in my CI pipeline.