diff --git a/indexing-service/src/test/java/org/apache/druid/indexing/worker/WorkerTaskManagerTest.java b/indexing-service/src/test/java/org/apache/druid/indexing/worker/WorkerTaskManagerTest.java
index 2eee78045611..75e5a677fc29 100644
--- a/indexing-service/src/test/java/org/apache/druid/indexing/worker/WorkerTaskManagerTest.java
+++ b/indexing-service/src/test/java/org/apache/druid/indexing/worker/WorkerTaskManagerTest.java
@@ -47,6 +47,7 @@
 import org.apache.druid.indexing.overlord.TestTaskRunner;
 import org.apache.druid.indexing.worker.config.WorkerConfig;
 import org.apache.druid.java.util.common.FileUtils;
+import org.apache.druid.java.util.common.StringUtils;
 import org.apache.druid.java.util.http.client.response.StringFullResponseHolder;
 import org.apache.druid.query.policy.NoopPolicyEnforcer;
 import org.apache.druid.rpc.HttpResponseException;
@@ -309,6 +310,13 @@ public void testTaskRun() throws Exception
     Assertions.assertNotNull(update4.getTaskAnnouncement().getTaskLocation().getHost());
   }
 
+  @Test
+  public void testAssignTaskWithMaxLengthTaskId() throws Exception
+  {
+    workerTaskManager.start();
+    Assertions.assertDoesNotThrow(() -> workerTaskManager.assignTask(createNoopTask(StringUtils.repeat("x", 255))));
+  }
+
   @Test
   @Timeout(value = 30_000L, unit = TimeUnit.MILLISECONDS)
   public void testTaskStatusWhenTaskRunnerFutureThrowsException() throws Exception
diff --git a/processing/src/main/java/org/apache/druid/java/util/common/FileUtils.java b/processing/src/main/java/org/apache/druid/java/util/common/FileUtils.java
index fee9217db61a..df1c292b1751 100644
--- a/processing/src/main/java/org/apache/druid/java/util/common/FileUtils.java
+++ b/processing/src/main/java/org/apache/druid/java/util/common/FileUtils.java
@@ -262,7 +262,7 @@ public static <T> T writeAtomically(final File file, OutputStreamConsumer<T> f)
    */
   public static <T> T writeAtomically(final File file, final File tmpDir, OutputStreamConsumer<T> f) throws IOException
   {
-    final File tmpFile = new File(tmpDir, StringUtils.format(".%s.%s", file.getName(), UUID.randomUUID()));
+    final File tmpFile = new File(tmpDir, "." + UUID.randomUUID());
 
     //noinspection unused
     try (final Closeable ignoredDeleter = () -> Files.deleteIfExists(tmpFile.toPath())) {
diff --git a/processing/src/test/java/org/apache/druid/java/util/common/FileUtilsTest.java b/processing/src/test/java/org/apache/druid/java/util/common/FileUtilsTest.java
index ca23f891d33d..ef318d741582 100644
--- a/processing/src/test/java/org/apache/druid/java/util/common/FileUtilsTest.java
+++ b/processing/src/test/java/org/apache/druid/java/util/common/FileUtilsTest.java
@@ -174,6 +174,14 @@ public void testWriteAtomically() throws IOException
     Assertions.assertEquals("baz", StringUtils.fromUtf8(Files.readAllBytes(tmpFile.toPath())));
   }
 
+  @Test
+  public void testWriteAtomicallyMaxLengthFileName() throws IOException
+  {
+    final File file = new File(temporaryFolder.getRoot(), StringUtils.repeat("a", 255));
+    FileUtils.writeAtomically(file, out -> true);
+    Assertions.assertTrue(file.exists());
+  }
+
   @Test
   public void testResolveFileWithinDirectory()
   {