how can I setup a global error handler?

[howard-repos]

I knew that exception in call effect should be catched otherwise it will propagate to parent.But I do not want to wirte the same try/catch code everywhere, so can I setup a global error handler for these kind of things.

function* fetchProducts() {
  try {
    const products = yield call(Api.fetch, '/products')
    yield put({ type: 'PRODUCTS_RECEIVED', products })
  }
  catch(error) {
    yield put({ type: 'FAILED', error })
  }
}

[Taym95]

Do you want to catch all uncaught exceptions? if yes you can do it like this:

const rootTask = sagaMiddleware.run(rootSaga); rootTask.done.catch(function (err) { console.log("Error in Sagas", err); });

[howard-repos]

Do you want to catch all uncaught exceptions? if yes you can do it like this:

const rootTask = sagaMiddleware.run(rootSaga); rootTask.done.catch(function (err) { console.log("Error in Sagas", err); });

But in this way, the rootTask has been stopped.

[howard-repos]

Or how can I make the following code keep running even though there is an error in Api.fetch

export function* getAllProducts() {
  const products = yield call(api.getProducts)
  yield put(actions.receiveProducts(products))
}

export function* watchGetProducts() {
  yield takeEvery(actions.GET_ALL_PRODUCTS, getAllProducts)
}

[feichao93]

@Kabike You could use the following code to let your saga automatically restart when it encounters an error:

function keepAlive(sagaFn) {
  return function*() {
    while (true) {
      try {
        const result = yield io.call(sagaFn)
        console.log('saga completes with result:', result)
        return result
      } catch (e) {
        console.error('saga aborted due to:', e)
        console.log('restarting the saga...')
      }
    }
  }
}

// And your code becomes like...
yield takeEvery(actions.GET_ALL_PRODUCTS, keepAlive(getAllProducts))

You can put keepAlive at a higher level (say, the rootSaga) to control the granularity of restarting behaviors.restart

[mshustov]

root saga restart will reset internal state of it and its child sagas
another alternative is to write your safe call wrapper, which also could do reporting
#1250

[mshustov]

closed as there are no action points here

[michael-freidgeim-webjet]

We used function similar to suggested by @Taym95

    sagaMiddleware.run(rootSagas, store.dispatch).done.catch(e => {
        logger.error({ message: e.message, source: 'sagaError', stacktrace: e.sagaStack });
    });

with old version "redux-saga": "^0.15.3",, but after I tried to update to the latest V1.1.1,
I am getting TypeError: Cannot read property 'catch' of undefined.
What is correct syntax now?

[Andarist]

sagaMiddleware.run(rootSagas, store.dispatch).toPromise().catch(e => {
        logger.error({ message: e.message, source: 'sagaError', stacktrace: e.sagaStack });
    });