From b07fe5cb074f939704b04a4ef130ea1b04bad347 Mon Sep 17 00:00:00 2001
From: Ehsan Nasiri <ehsann@google.com>
Date: Tue, 2 Jan 2024 16:09:39 -0800
Subject: [PATCH] Use a cached thread pool for executing transaction callbacks.

---
 .../java/com/google/cloud/firestore/TransactionRunner.java     | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/google-cloud-firestore/src/main/java/com/google/cloud/firestore/TransactionRunner.java b/google-cloud-firestore/src/main/java/com/google/cloud/firestore/TransactionRunner.java
index 6ab4fecd2..fce1e8f70 100644
--- a/google-cloud-firestore/src/main/java/com/google/cloud/firestore/TransactionRunner.java
+++ b/google-cloud-firestore/src/main/java/com/google/cloud/firestore/TransactionRunner.java
@@ -32,6 +32,7 @@
 import io.opencensus.trace.Tracer;
 import io.opencensus.trace.Tracing;
 import java.util.concurrent.Executor;
+import java.util.concurrent.Executors;
 import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.TimeUnit;
 
@@ -85,7 +86,7 @@ class TransactionRunner<T> {
         Context.currentContextExecutor(
             transactionOptions.getExecutor() != null
                 ? transactionOptions.getExecutor()
-                : this.firestore.getClient().getExecutor());
+                : Executors.newCachedThreadPool());
 
     this.backoffAlgorithm =
         new ExponentialRetryAlgorithm(