After enabling the layered service, there is an error message when querying data

### Search before asking

- [x] I searched in the [issues](https://github.com/apache/fluss/issues) and found nothing similar.

### Fluss version

0.8.0 (latest release)

### Please describe the bug 🐞

CREATE TABLE fluss_orders(
> order_id string,
> user_id int,
> sku_id string,
> amount decimal(10,2),
> order_time TIMESTAMP(0),
> `ptime` AS PROCTIME(),
> PRIMARY KEY (order_id) NOT ENFORCED
> ) WITH (
> 'table.datalake.enabled' = 'true',
> 'table.datalake.freshness' = '1m',
> 'paimon.file.format' = 'parquet',
> 'paimon.deletion-vectors.enabled' = 'true'
> );
===================================================
/opt/flink-1.20.3/bin/flink run \
-Dpipeline.name="My Fluss Tiering Service1" \
-Dexecution.checkpointing.interval=2m \
-Dexecution.checkpointing.timeout=3m \
-Dexecution.checkpointing.min-pause=1m \
-Dexecution.checkpointing.mode=EXACTLY_ONCE \
-Dparallelism.default=2 \
/opt/fluss-0.8.0-incubating/fluss-flink-tiering-0.8.0-incubating.jar \
--fluss.bootstrap.servers 192.168.40.102:9123 \
--datalake.format paimon \
--datalake.paimon.metastore hive \
--datalake.paimon.warehouse hdfs:///user/hive/warehouse \
--datalake.paimon.uri thrift://192.168.40.102:9083

2025-12-03 20:10:32
org.apache.flink.util.FlinkException: Global failure triggered by OperatorCoordinator for 'Source: fluss_orders[4] -> Calc[5] -> ConstraintEnforcer[6]' (operator cbc357ccb763df2852fee8c4fc7d55f2).
at org.apache.flink.runtime.operators.coordination.OperatorCoordinatorHolder$LazyInitializedCoordinatorContext.failJob(OperatorCoordinatorHolder.java:651)
at org.apache.flink.runtime.operators.coordination.RecreateOnResetOperatorCoordinator$QuiesceableContext.failJob(RecreateOnResetOperatorCoordinator.java:259)
at org.apache.flink.runtime.source.coordinator.SourceCoordinatorContext.failJob(SourceCoordinatorContext.java:432)
at org.apache.flink.runtime.source.coordinator.SourceCoordinatorContext.handleUncaughtExceptionFromAsyncCall(SourceCoordinatorContext.java:445)
at org.apache.flink.util.ThrowableCatchingRunnable.run(ThrowableCatchingRunnable.java:42)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:842)
Caused by: org.apache.flink.util.FlinkRuntimeException: Failed to list splits for luxl_test.fluss_orders to read due to
at org.apache.fluss.flink.source.enumerator.FlinkSourceEnumerator.handleSplitsAdd(FlinkSourceEnumerator.java:679)
at org.apache.flink.runtime.source.coordinator.ExecutorNotifier.lambda$null$1(ExecutorNotifier.java:83)
at org.apache.flink.util.ThrowableCatchingRunnable.run(ThrowableCatchingRunnable.java:40)
... 6 more
Caused by: org.apache.flink.util.FlinkRuntimeException: Failed to generate hybrid lake fluss splits
at org.apache.fluss.flink.source.enumerator.FlinkSourceEnumerator.generateHybridLakeFlussSplits(FlinkSourceEnumerator.java:634)
at org.apache.fluss.flink.source.enumerator.FlinkSourceEnumerator.lambda$startInStreamModeForNonPartitionedTable$1(FlinkSourceEnumerator.java:323)
at org.apache.flink.runtime.source.coordinator.ExecutorNotifier.lambda$notifyReadyAsync$2(ExecutorNotifier.java:80)
... 6 more
Caused by: java.util.NoSuchElementException
at java.base/java.util.HashMap$HashIterator.nextNode(HashMap.java:1599)
at java.base/java.util.HashMap$ValueIterator.next(HashMap.java:1625)
at org.apache.fluss.flink.lake.LakeSplitGenerator.generateHybridLakeFlussSplits(LakeSplitGenerator.java:122)
at org.apache.fluss.flink.source.enumerator.FlinkSourceEnumerator.generateHybridLakeFlussSplits(FlinkSourceEnumerator.java:631)
... 8 more

=============================================================

[root@localhost ~]# hadoop fs -ls /user/hive/warehouse/luxl_test.db/fluss_orders
Found 4 items
drwxr-xr-x - root supergroup 0 2025-12-03 20:08 /user/hive/warehouse/luxl_test.db/fluss_orders/bucket-0
drwxr-xr-x - root supergroup 0 2025-12-03 20:08 /user/hive/warehouse/luxl_test.db/fluss_orders/manifest
drwxr-xr-x - root supergroup 0 2025-12-03 20:06 /user/hive/warehouse/luxl_test.db/fluss_orders/schema
drwxr-xr-x - root supergroup 0 2025-12-03 20:08 /user/hive/warehouse/luxl_test.db/fluss_orders/snapshot
[root@localhost ~]#

================================================================
conf/server.yaml
datalake.format: paimon
datalake.paimon.metastore: hive
datalake.paimon.uri: thrift://192.168.40.102:9083
datalake.paimon.warehouse: hdfs:///user/hive/warehouse

### Solution

_No response_

### Are you willing to submit a PR?

- [x] I'm willing to submit a PR!

Reproduce the query using the provided CREATE TABLE, tiering-service command, and conf/server.yaml settings. Start at FlinkSourceEnumerator.java:634 and LakeSplitGenerator.java:122, then verify the hybrid lake split generation no longer throws NoSuchElementException and the table can be queried successfully.

Written by the indexing model from the issue text.