ConcurrentModificationException when opening wallet

[kycfree1]

Post 1.6.6 update I have encountered an issue when attempting to open a specific wallet file. After decrypting the file with the wallet password, I get an error message pop-up after entering my passphrase saying "Error Opening Wallet". Clicking ok takes me to my unlocked wallet where everything except my post-mix wallet is open. From what I can see this is only effecting a single wallet file.

After 7-8 attempts the wallet finally unlocked however, closing & reopening the file again reproduced the same issue.

ERROR [JavaFX Application Thread] c.s.s.AppController [null:-1] Error opening wallet java.util.ConcurrentModificationException: null

[craigraw]

Thanks for the report. Unfortunately this is not a particularly helpful error in the logs. I assume nothing else is written to the log when the error occurs? It might be worthwhile to cut and paste a broader area from the log file just to be sure.

Otherwise, the best way to track this down would be to run from source, which should provide more logging. Doing so is not particularly difficult. Unless you have another way of installing Java 18, I suggest running on the command line (I assume you are using Linux):

curl -s "https://get.sdkman.io" | bash

to install it SDKman, which is a useful package manager. Then in a new terminal:

sdk install java 18.0.1-tem
GIT_TAG="1.6.6"
git clone --recursive --branch "${GIT_TAG}" https://github.com/sparrowwallet/sparrow.git
cd sparrow
./sparrow

This will run Sparrow from source. When you open that wallet file again, you should see a more comprehensive error printed to the terminal.

[ghost]

Since opening the issue it's not happened again. I will keep a close eye and continue opening & closing the wallet. If I'm unable to reproduce again over the next 14 days I will close the ticket, otherwise I'll post the logs as requested.