XComp commented on pull request #19199:
URL: https://github.com/apache/flink/pull/19199#issuecomment-1075350666


   The ci run failed due to the debug commit I added: The zookeeper-server.log 
contain additional debug logs about final requests, e.g. the first 
getAndIncrement call:
   ```
   14:48:43,156 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - Processing 
request:: sessionid:0x101b66cf7c70000 type:createSession cxid:0x0 zxid:0x1 
txntype:-10 reqpath:n/a
   14:48:43,165 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - 
sessionid:0x101b66cf7c70000 type:createSession cxid:0x0 zxid:0x1 txntype:-10 
reqpath:n/a
   14:48:43,188 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - Processing 
request:: sessionid:0x101b66cf7c70000 type:getData cxid:0x1 
zxid:0xfffffffffffffffe txntype:unknown reqpath:/zookeeper/config
   14:48:43,188 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - 
sessionid:0x101b66cf7c70000 type:getData cxid:0x1 zxid:0xfffffffffffffffe 
txntype:unknown reqpath:/zookeeper/config
   14:48:43,191 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - Processing 
request:: sessionid:0x101b66cf7c70000 type:getData cxid:0x2 
zxid:0xfffffffffffffffe txntype:unknown reqpath:/zookeeper/config
   14:48:43,191 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - 
sessionid:0x101b66cf7c70000 type:getData cxid:0x2 zxid:0xfffffffffffffffe 
txntype:unknown reqpath:/zookeeper/config
   14:48:43,203 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - Processing 
request:: sessionid:0x101b66cf7c70000 type:exists cxid:0x3 
zxid:0xfffffffffffffffe txntype:unknown reqpath:/flink
   14:48:43,203 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - 
sessionid:0x101b66cf7c70000 type:exists cxid:0x3 zxid:0xfffffffffffffffe 
txntype:unknown reqpath:/flink
   14:48:43,207 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - Processing 
request:: sessionid:0x101b66cf7c70000 type:exists cxid:0x4 
zxid:0xfffffffffffffffe txntype:unknown reqpath:/flink
   14:48:43,207 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - 
sessionid:0x101b66cf7c70000 type:exists cxid:0x4 zxid:0xfffffffffffffffe 
txntype:unknown reqpath:/flink
   14:48:43,235 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - Processing 
request:: sessionid:0x101b66cf7c70000 type:createContainer cxid:0x5 zxid:0x2 
txntype:19 reqpath:n/a
   14:48:43,271 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - 
sessionid:0x101b66cf7c70000 type:createContainer cxid:0x5 zxid:0x2 txntype:19 
reqpath:n/a
   14:48:43,324 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - Processing 
request:: sessionid:0x101b66cf7c70000 type:createContainer cxid:0x6 zxid:0x3 
txntype:-1 reqpath:n/a
   14:48:43,337 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - Processing 
request:: sessionid:0x101b66cf7c70000 type:exists cxid:0x7 
zxid:0xfffffffffffffffe txntype:unknown reqpath:/flink/default
   14:48:43,337 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - 
sessionid:0x101b66cf7c70000 type:exists cxid:0x7 zxid:0xfffffffffffffffe 
txntype:unknown reqpath:/flink/default
   14:48:43,394 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - Processing 
request:: sessionid:0x101b66cf7c70000 type:createContainer cxid:0x8 zxid:0x4 
txntype:19 reqpath:n/a
   14:48:43,395 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - 
sessionid:0x101b66cf7c70000 type:createContainer cxid:0x8 zxid:0x4 txntype:19 
reqpath:n/a
   14:48:43,395 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - Processing 
request:: sessionid:0x101b66cf7c70000 type:exists cxid:0x9 
zxid:0xfffffffffffffffe txntype:unknown reqpath:/flink/default
   14:48:43,395 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - 
sessionid:0x101b66cf7c70000 type:exists cxid:0x9 zxid:0xfffffffffffffffe 
txntype:unknown reqpath:/flink/default
   14:48:43,399 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - Processing 
request:: sessionid:0x101b66cf7c70000 type:getData cxid:0xa 
zxid:0xfffffffffffffffe txntype:unknown 
reqpath:/flink/default/checkpoint_id_counter
   14:48:43,399 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - 
sessionid:0x101b66cf7c70000 type:getData cxid:0xa zxid:0xfffffffffffffffe 
txntype:unknown reqpath:/flink/default/checkpoint_id_counter
   14:48:43,446 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - Processing 
request:: sessionid:0x101b66cf7c70000 type:create2 cxid:0xb zxid:0x5 txntype:15 
reqpath:n/a
   14:48:43,446 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - 
sessionid:0x101b66cf7c70000 type:create2 cxid:0xb zxid:0x5 txntype:15 
reqpath:n/a
   14:48:43,451 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - Processing 
request:: sessionid:0x101b66cf7c70000 type:getData cxid:0xc 
zxid:0xfffffffffffffffe txntype:unknown 
reqpath:/flink/default/checkpoint_id_counter
   14:48:43,452 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - 
sessionid:0x101b66cf7c70000 type:getData cxid:0xc zxid:0xfffffffffffffffe 
txntype:unknown reqpath:/flink/default/checkpoint_id_counter
   14:48:43,573 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - Processing 
request:: sessionid:0x101b66cf7c70000 type:setData cxid:0xd zxid:0x6 txntype:5 
reqpath:n/a
   14:48:43,580 [        SyncThread:0] DEBUG 
org.apache.zookeeper.server.FinalRequestProcessor            [] - 
sessionid:0x101b66cf7c70000 type:setData cxid:0xd zxid:0x6 txntype:5 reqpath:n/a
   ```
   I agree that it's a bit verbose. But it should give us a way to see, what 
actually happened on the ZooKeeper server.


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