服务器强制重启后，有时Kafka等会保存checkpoint，但是断点信息出现错误。启动Kafka服务时，出现如下错误：
ERROR Error while reading checkpoint file /home/kafka-2.3.1/kafka-logs/recovery-point-offset-checkpoint (kafka.server.LogDirFailureChannel)
java.io.IOException: Malformed line in checkpoint file (/home/kafka-2.3.1/kafka-logs/recovery-point-offset-checkpoint): '
以及：
[2022-12-27 14:49:16,226] ERROR Error while reading checkpoint file /home/kafka-2.3.1/kafka-logs/replication-offset-checkpoint (kafka.server.LogDirFailureChannel)
java.io.IOException: Malformed line in checkpoint file (/home/kafka-2.3.1/kafka-logs/replication-offset-checkpoint): '
at kafka.server.checkpoints.CheckpointFile.malformedLineException$1(CheckpointFile.scala:84)
at kafka.server.checkpoints.CheckpointFile.liftedTree2$1(CheckpointFile.scala:107)
at kafka.server.checkpoints.CheckpointFile.read(CheckpointFile.scala:86)
at kafka.server.checkpoints.OffsetCheckpointFile.read(OffsetCheckpointFile.scala:61)
at kafka.cluster.Partition$$anonfun$getOrCreateReplica$1.apply(Partition.scala:222)
at kafka.cluster.Partition$$anonfun$getOrCreateReplica$1.apply(Partition.scala:216)
at kafka.utils.Pool$$anon$2.apply(Pool.scala:61)
at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660)
at kafka.utils.Pool.getAndMaybePut(Pool.scala:60)
at kafka.cluster.Partition.getOrCreateReplica(Partition.scala:215)
at kafka.server.ReplicaManager$$anonfun$makeFollowers$3.apply(ReplicaManager.scala:1304)
at kafka.server.ReplicaManager$$anonfun$makeFollowers$3.apply(ReplicaManager.scala:1281)
at scala.collection.mutable.HashMap$$anonfun$foreach$1.apply(HashMap.scala:130)
at scala.collection.mutable.HashMap$$anonfun$foreach$1.apply(HashMap.scala:130)
at scala.collection.mutable.HashTable$class.foreachEntry(HashTable.scala:236)
at scala.collection.mutable.HashMap.foreachEntry(HashMap.scala:40)
at scala.collection.mutable.HashMap.foreach(HashMap.scala:130)
at kafka.server.ReplicaManager.makeFollowers(ReplicaManager.scala:1281)
at kafka.server.ReplicaManager.becomeLeaderOrFollower(ReplicaManager.scala:1119)
at kafka.server.KafkaApis.handleLeaderAndIsrRequest(KafkaApis.scala:201)
at kafka.server.KafkaApis.handle(KafkaApis.scala:117)
at kafka.server.KafkaRequestHandler.run(KafkaRequestHandler.scala:69)
at java.lang.Thread.run(Thread.java:748)
为避免丢失数据，不要删除日志或者断点文件后重启，达到服务正常启动的目的。针对于本问题的解决方法如下：
分别找到上面所指的断点和分区文件，打开文件，会发现文章末尾或某些位置有未知的符号。
出错的文件在文件末尾有：@^等蓝色符号，或者不规范的符号和数据
对比其他服务器上的该文件，可以删除掉这些符号。然后Kafka服务即可重启。
正常replication-offset-checkpoint文件如下：
0
6
test 0 81812
testReceiver-session 0 108
app0-KSTREAM-AGGREGATE-STATE-STORE-0000000003-repartition 0 0
test 1 393337
simpleTest 0 48649
shareplex 0 10
正常recovery-point-offset-checkpoint文件如下：
0
33
dept 1 0
__consumer_offsets 30 241
__consumer_offsets 21 0
qkgj 2 0
bar 5 0
__consumer_offsets 27 3
__consumer_offsets 9 33
bar 1 0
__consumer_offsets 33 189
zyqw 2 0
Partitions-3-test 1 86580
test 0 81812
bar 6 0
__consumer_offsets 36 9
__consumer_offsets 42 1138648
bar 0 0
__consumer_offsets 3 9355
__consumer_offsets 18 4011
__consumer_offsets 15 86
__consumer_offsets 24 4282
testReceiver-session 0 108
app0-KSTREAM-AGGREGATE-STATE-STORE-0000000003-repartition 0 0
__consumer_offsets 48 354426
test 1 393337
bar 7 0
__consumer_offsets 6 42071
bar 4 0
__consumer_offsets 0 37343
__consumer_offsets 39 142047
__consumer_offsets 12 97
__consumer_offsets 45 148239
simpleTest 0 48649
share 0 10
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