Retry RebalanceInProgressException in CommitRecovery.Default

modules/core/src/main/scala/fs2/kafka/CommitRecovery.scala

@@ -15,6 +15,7 @@ import cats.syntax.functor.*
 import cats.Functor
 
 import org.apache.kafka.clients.consumer.{OffsetAndMetadata, RetriableCommitFailedException}
+import org.apache.kafka.common.errors.RebalanceInProgressException
 import org.apache.kafka.common.TopicPartition
 
 /**
@@ -51,18 +52,19 @@ object CommitRecovery {
 
   /**
     * The default [[CommitRecovery]] used in [[ConsumerSettings]] unless a different one has been
-    * specified. The default recovery strategy only retries `RetriableCommitFailedException`s. These
-    * exceptions are retried with a jittered exponential backoff, where the time in milliseconds
-    * before retrying is calculated using:
+    * specified. The default recovery strategy only retries `RetriableCommitFailedException`s and
+    * `RebalanceInProgressException`s. These exceptions are retried with a jittered exponential
+    * backoff, where the time in milliseconds before retrying is calculated using:
     *
     * {{{
     * Random.nextDouble() * Math.min(10000, 10 * Math.pow(2, n))
     * }}}
     *
     * where `n` is the retry attempt (first attempt is `n = 1`). This is done for up to 10 attempts,
     * after which we change to retry using a fixed time of 10 seconds, for up to another 5 attempts.
-    * If at that point we are still faced with `RetriableCommitFailedException`, we give up and
-    * raise a [[CommitRecoveryException]] with the last such error experienced.<br><br>
+    * If at that point we are still faced with `RetriableCommitFailedException` or
+    * `RebalanceInProgressException`, we give up and raise a [[CommitRecoveryException]] with the
+    * last such error experienced.<br><br>
     *
     * The sum of time spent waiting between retries will always be less than 70 220 milliseconds, or
     * ~70 seconds. Note that this does not include the time for attempting to commit offsets. Offset
@@ -87,7 +89,7 @@ object CommitRecovery {
         jitter: Jitter[F]
       ): Throwable => F[Unit] = {
         def retry(attempt: Int): Throwable => F[Unit] = {
-          case retriable: RetriableCommitFailedException =>
+          case retriable @ (_: RetriableCommitFailedException | _: RebalanceInProgressException) =>
             val commitWithRecovery = commit.handleErrorWith(retry(attempt + 1))
             if (attempt <= 10) backoff(attempt).flatMap(F.sleep) >> commitWithRecovery
             else if (attempt <= 15) F.sleep(10.seconds) >> commitWithRecovery

modules/core/src/test/scala/fs2/kafka/CommitRecoverySpec.scala

@@ -15,50 +15,55 @@ import cats.effect.unsafe.implicits.global
 import cats.syntax.functor.*
 
 import org.apache.kafka.clients.consumer.{OffsetAndMetadata, RetriableCommitFailedException}
+import org.apache.kafka.common.errors.RebalanceInProgressException
 import org.apache.kafka.common.TopicPartition
 
 final class CommitRecoverySpec extends BaseAsyncSpec {
 
   describe("CommitRecovery#Default") {
-    it("should retry with jittered exponential backoff and fixed rate") {
-      val (result: Either[Throwable, Unit], sleeps: Chain[FiniteDuration]) =
-        Ref
-          .of[IO, Chain[FiniteDuration]](Chain.empty)
-          .flatMap { ref =>
-            implicit val temporal: Temporal[IO] = storeSleepsTemporal(ref)
-            val commit: IO[Unit]                = IO.raiseError(new RetriableCommitFailedException("retriable"))
-            val offsets                         = Map(new TopicPartition("topic", 0) -> new OffsetAndMetadata(1))
-            val recovery                        = CommitRecovery.Default.recoverCommitWith(offsets, commit)
-            val attempted                       = commit.handleErrorWith(recovery).attempt
-            attempted.flatMap(ref.get.tupleLeft)
-          }
-          .unsafeRunSync()
-
-      assert {
-        result
-          .left
-          .toOption
-          .map(_.toString)
-          .contains {
-            "fs2.kafka.CommitRecoveryException: offset commit is still failing after 15 attempts for offsets: topic-0 -> 1; last exception was: org.apache.kafka.clients.consumer.RetriableCommitFailedException: retriable"
-          }
-      }
 
-      assert(sleeps.size == 15L)
+    List(new RetriableCommitFailedException("retriable"), new RebalanceInProgressException())
+      .foreach { ex =>
+        it(s"should retry $ex with jittered exponential backoff and fixed rate") {
+          val (result: Either[Throwable, Unit], sleeps: Chain[FiniteDuration]) =
+            Ref
+              .of[IO, Chain[FiniteDuration]](Chain.empty)
+              .flatMap { ref =>
+                implicit val temporal: Temporal[IO] = storeSleepsTemporal(ref)
+                val commit: IO[Unit]                = IO.raiseError(ex)
+                val offsets                         = Map(new TopicPartition("topic", 0) -> new OffsetAndMetadata(1))
+                val recovery                        = CommitRecovery.Default.recoverCommitWith(offsets, commit)
+                val attempted                       = commit.handleErrorWith(recovery).attempt
+                attempted.flatMap(ref.get.tupleLeft)
+              }
+              .unsafeRunSync()
+
+          assert {
+            result
+              .left
+              .toOption
+              .map(_.toString)
+              .contains {
+                s"fs2.kafka.CommitRecoveryException: offset commit is still failing after 15 attempts for offsets: topic-0 -> 1; last exception was: $ex"
+              }
+          }
 
-      assert {
-        sleeps
-          .toList
-          .take(10)
-          .zipWithIndex
-          .forall { case (sleep, attempt) =>
-            val max = 10 * Math.pow(2, attempt.toDouble + 1)
-            0 <= sleep.toMillis && sleep.toMillis < max
+          assert(sleeps.size == 15L)
+
+          assert {
+            sleeps
+              .toList
+              .take(10)
+              .zipWithIndex
+              .forall { case (sleep, attempt) =>
+                val max = 10 * Math.pow(2, attempt.toDouble + 1)
+                0 <= sleep.toMillis && sleep.toMillis < max
+              }
           }
-      }
 
-      assert(sleeps.toList.drop(10).forall(_.toMillis == 10000L))
-    }
+          assert(sleeps.toList.drop(10).forall(_.toMillis == 10000L))
+        }
+      }
 
     it("should not recover non-retriable exceptions") {
       val commit: IO[Unit] = IO.raiseError(new RuntimeException("commit"))