[Bug] doris2.1.7的fe的cpu持续超过60%

[jameswangcnbj]

Search before asking

• I had searched in the issues and found no similar issues.

Version

2.1.7

What's Wrong?

很奇怪现象，2.1.7的fe在没有实时连接的情况下，cpu的占用率也超过60%，如下图所示
https://ask.selectdb.com/uploads/post/5jc8xaLDYY9.png
top -H -p fe进程
https://ask.selectdb.com/uploads/post/5jc8D2nnYeW.png

fe的配置：
元数据保存位置
meta_dir = /data/doris-meta

#多网卡配置网段
priority_networks = 172.16.0.0/24

#调整 FE 内存，默认8g，因为目前总内存16G，暂不调整
#修改 Doris 大小写敏感参数
lower_case_table_names = 1
enable_outfile_to_local=true

#解决内存占用高的参数
wait_timeout = 300
set global enable_auto_analyze = false

What You Expected?

cpu在没有外部连接的时候，低于20%

How to Reproduce?

No response

Anything Else?

No response

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct

[ixzc]

How many cores does your FE have? which version did you use before?

[jameswangcnbj]

How many cores does your FE have? which version did you use before?

the machine is Alibaba Cloud Elastic Compute Service .

cat /proc/cpuinfo |grep "name" |cut -f2 -d: |uniq -c
4 Intel(R) Xeon(R) Platinum

[jameswangcnbj]

jstack output:
jstack 31657 |grep -A 50 7bee
"replayer" #92 daemon prio=5 os_prio=0 tid=0x00007fa65c005000 nid=0x7bee runnable [0x00007fa60affa000]
java.lang.Thread.State: RUNNABLE
at com.sleepycat.je.dbi.DiskOrderedScanner.processBINInternal(DiskOrderedScanner.java:1945)
at com.sleepycat.je.dbi.DiskOrderedScanner.accumulateBINs(DiskOrderedScanner.java:1169)
at com.sleepycat.je.dbi.DiskOrderedScanner.scanSerial(DiskOrderedScanner.java:758)
at com.sleepycat.je.dbi.DiskOrderedScanner.scan(DiskOrderedScanner.java:708)
at com.sleepycat.je.dbi.DatabaseImpl.count(DatabaseImpl.java:1510)
at com.sleepycat.je.Database.count(Database.java:2042)
at org.apache.doris.journal.bdbje.BDBJEJournal.getMaxJournalIdInternal(BDBJEJournal.java:414)
at org.apache.doris.journal.bdbje.BDBJEJournal.getMaxJournalId(BDBJEJournal.java:379)
at org.apache.doris.persist.EditLog.getMaxJournalId(EditLog.java:136)
at org.apache.doris.catalog.Env.getMaxJournalId(Env.java:4257)
at org.apache.doris.catalog.Env.replayJournal(Env.java:2821)
- locked <0x00000005c5801ca0> (a org.apache.doris.catalog.Env)
at org.apache.doris.catalog.Env$4.runOneCycle(Env.java:2622)
at org.apache.doris.common.util.Daemon.run(Daemon.java:119)

"Thread-38" #50 daemon prio=5 os_prio=0 tid=0x00007fa6c0b53800 nid=0x7bed waiting on condition [0x00007fa60b3fb000]
java.lang.Thread.State: TIMED_WAITING (sleeping)
at java.lang.Thread.sleep(Native Method)
at org.apache.doris.common.util.Daemon.run(Daemon.java:125)

"Automatic Analyzer" #43 daemon prio=5 os_prio=0 tid=0x00007fa6c0b52800 nid=0x7bec waiting on condition [0x00007fa60b7fc000]
java.lang.Thread.State: TIMED_WAITING (sleeping)
at java.lang.Thread.sleep(Native Method)
at org.apache.doris.common.util.Daemon.run(Daemon.java:125)

"Statistics Table Cleaner" #41 daemon prio=5 os_prio=0 tid=0x00007fa6c1cf1000 nid=0x7beb waiting on condition [0x00007fa60bbfd000]
java.lang.Thread.State: TIMED_WAITING (sleeping)
at java.lang.Thread.sleep(Native Method)
at org.apache.doris.common.util.Daemon.run(Daemon.java:125)

"stateListener" #90 daemon prio=5 os_prio=0 tid=0x00007fa6c1cf0000 nid=0x7bea waiting on condition [0x00007fa60bffe000]
java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00000005c5b11c08> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
at java.util.concurrent.LinkedBlockingDeque.takeFirst(LinkedBlockingDeque.java:492)
at java.util.concurrent.LinkedBlockingDeque.take(LinkedBlockingDeque.java:680)
at org.apache.doris.catalog.Env$5.runOneCycle(Env.java:2715)
- locked <0x00000005c3203ff0> (a org.apache.doris.catalog.Env$5)
at org.apache.doris.common.util.Daemon.run(Daemon.java:119)

"ReplayThread" #87 daemon prio=5 os_prio=0 tid=0x00007fa648825000 nid=0x7be9 waiting on condition [0x00007fa614df2000]
java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00000005c3204328> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
at java.util.concurrent.ArrayBlockingQueue.poll(ArrayBlockingQueue.java:418)

[jameswangcnbj]

自己解决了上述问题
之前是关闭了默认的22的端口，导致ssh到其他机器，无法正常ssh过去，我重新开发了22端口后，目前机器的cpu已经稳定了，fe的cpu在7%-10%之前，完全正常了。
原理猜测是fe的元数据同步不能正常进行，导致fe总在尝试，具体原理细节没有看到对应的资料，这里做个记录。

[llussy]

我也遇到了这个问题，doris刚部署完，新集群没有任何连接，CPU使用率高。

top -H -p fe进程，replayer 占用的高。

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