CODEWITHSUNDEEP
fluttergoogle-cloud-firestoretransactions
user13410550
user13410550

Reputation:

Running Firestore transaction at same location is crashing the app

I need to run two transactions at the same time towards one location in the firestore database, but when I implement it gives me error. I am implementing firestore transactions in flutter application, basically I am calling multilple transactions at press of one button. How should I make sure that this error doesn't occur and doesn't crashes my app.

The code added below clearly shows the calling of the transactions and the transactions are configured accurately and with no issues with them all the issue is happening as they are to be called at same to happen towards the same location.

I have shared the error log as well below. Please guide what should I do. 

FlatButton(
                  child: Text("btn3"),
                  onPressed: () {
                   Transaction1().postTransaction();
                    Transaction2().postTransaction();
                  },

ERROR LOGS

2020-05-27 18:43:14.529 1022-1344/dev.jideguru.social_app_ui E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #4 Process: dev.jideguru.social_app_ui, PID: 1022 java.lang.RuntimeException: An error occurred while executing doInBackground() at android.os.AsyncTask$3.done(AsyncTask.java:353) at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:383) at java.util.concurrent.FutureTask.setException(FutureTask.java:252) at java.util.concurrent.FutureTask.run(FutureTask.java:271) at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:245) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636) at java.lang.Thread.run(Thread.java:764) Caused by: java.lang.AssertionError: INTERNAL ASSERTION FAILED: A transaction object cannot be used after its update callback has been invoked. at com.google.firebase.firestore.util.Assert.fail(com.google.firebase:firebase-firestore@@21.3.0:46) at com.google.firebase.firestore.util.Assert.hardAssert(com.google.firebase:firebase-firestore@@21.3.0:31) at com.google.firebase.firestore.core.Transaction.ensureCommitNotCalled(com.google.firebase:firebase-firestore@@21.3.0:246) at com.google.firebase.firestore.core.Transaction.lookup(com.google.firebase:firebase-firestore@@21.3.0:81) at com.google.firebase.firestore.Transaction.getAsync(com.google.firebase:firebase-firestore@@21.3.0:191) at com.google.firebase.firestore.Transaction.get(com.google.firebase:firebase-firestore@@21.3.0:228) at io.flutter.plugins.firebase.cloudfirestore.CloudFirestorePlugin$5.doInBackground(CloudFirestorePlugin.java:613) at io.flutter.plugins.firebase.cloudfirestore.CloudFirestorePlugin$5.doInBackground(CloudFirestorePlugin.java:608) at android.os.AsyncTask$2.call(AsyncTask.java:333) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:245)  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)  at java.lang.Thread.run(Thread.java:764)  2020-05-27 18:43:14.529 1022-1346/dev.jideguru.social_app_ui E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #6 Process: dev.jideguru.social_app_ui, PID: 1022 java.lang.RuntimeException: An error occurred while executing doInBackground() at android.os.AsyncTask$3.done(AsyncTask.java:353) at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:383) at java.util.concurrent.FutureTask.setException(FutureTask.java:252) at java.util.concurrent.FutureTask.run(FutureTask.java:271) at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:245) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636) at java.lang.Thread.run(Thread.java:764) Caused by: java.lang.AssertionError: INTERNAL ASSERTION FAILED: A transaction object cannot be used after its update callback has been invoked. at com.google.firebase.firestore.util.Assert.fail(com.google.firebase:firebase-firestore@@21.3.0:46) at com.google.firebase.firestore.util.Assert.hardAssert(com.google.firebase:firebase-firestore@@21.3.0:31) at com.google.firebase.firestore.core.Transaction.ensureCommitNotCalled(com.google.firebase:firebase-firestore@@21.3.0:246) at com.google.firebase.firestore.core.Transaction.lookup(com.google.firebase:firebase-firestore@@21.3.0:81) at com.google.firebase.firestore.Transaction.getAsync(com.google.firebase:firebase-firestore@@21.3.0:191) at com.google.firebase.firestore.Transaction.get(com.google.firebase:firebase-firestore@@21.3.0:228) at io.flutter.plugins.firebase.cloudfirestore.CloudFirestorePlugin$5.doInBackground(CloudFirestorePlugin.java:613) at io.flutter.plugins.firebase.cloudfirestore.CloudFirestorePlugin$5.doInBackground(CloudFirestorePlugin.java:608) at android.os.AsyncTask$2.call(AsyncTask.java:333) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:245)  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)  at java.lang.Thread.run(Thread.java:764)

Upvotes: 0

Views: 295

Answers (1)

dev-aentgs
dev-aentgs

Reputation: 1288

Try using an async method and await keyword before the first transaction to wait before starting the second.

Upvotes: 1

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