cxzl25 commented on code in PR #7063:
URL: https://github.com/apache/hadoop/pull/7063#discussion_r1837436900
##########
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/protocol/datatransfer/PacketReceiver.java:
##########
@@ -162,8 +162,10 @@ private void doRead(ReadableByteChannel ch, InputStream in)
// Sanity check the buffer size so we don't allocate too much memory
// and OOME.
+ int maxPacketSize = MAX_PACKET_SIZE == 0 ?
+ HdfsClientConfigKeys.DFS_DATA_TRANSFER_MAX_PACKET_SIZE_DEFAULT :
MAX_PACKET_SIZE;
int totalLen = payloadLen + headerLen;
- if (totalLen < 0 || totalLen > MAX_PACKET_SIZE) {
+ if (totalLen < 0 || totalLen > maxPacketSize) {
Review Comment:
https://github.com/apache/hadoop/pull/7063#issuecomment-2370670841
PacketReceiver may make nested calls when reading conf, and the static block
has not yet been initialized.
```java
at
org.apache.hadoop.hdfs.protocol.datatransfer.PacketReceiver.doRead(PacketReceiver.java:166)
at
org.apache.hadoop.hdfs.protocol.datatransfer.PacketReceiver.receiveNextPacket(PacketReceiver.java:112)
...
at org.apache.hadoop.conf.Configuration.getInt(Configuration.java:1545)
at
org.apache.hadoop.hdfs.protocol.datatransfer.PacketReceiver.<clinit>(PacketReceiver.java:82)
at
org.apache.hadoop.hdfs.client.impl.BlockReaderRemote.<init>(BlockReaderRemote.java:101)
```
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