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IGNITE-23138 Fix TxWithKeyContentionSelfTest (Cache 12 group) #11512

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Thank you for submitting the pull request to the Apache Ignite.

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*/
private void startTransactions(Ignite clientIgnite, IgniteCache<Integer, Integer> cache, int contCnt,
TransactionConcurrency concurrency, TransactionIsolation isolation) {
ExecutorService executor = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
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Why should we migrate to ExecutorService from runAsync?

TransactionConcurrency concurrency, TransactionIsolation isolation) {
ExecutorService executor = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());

for (int i = 0; i < 5; i++) {
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Magic number. And why 5? Not 2? Not 10?


assertTrue(GridTestUtils.waitForCondition(new GridAbsPredicate() {
@Override public boolean apply() {
startTransactions(cl, cache, contCnt, concurrency, isolation);
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Why should we start transactions in the predicate?

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@superminkfan , transactions are still in the predicate.

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