Michael Stack created HDFS-16586:
------------------------------------
Summary: Purge FsDatasetAsyncDiskService threadgroup; it causes
BPServiceActor$CommandProcessingThread IllegalThreadStateException 'fatal
exception and exit'
Key: HDFS-16586
URL: https://issues.apache.org/jira/browse/HDFS-16586
Project: Hadoop HDFS
Issue Type: Bug
Components: datanode
Affects Versions: 3.2.3, 3.3.0
Reporter: Michael Stack
Assignee: Michael Stack
The below failed block finalize is causing a downstreamer's test to fail when
it uses hadoop 3.2.3 or 3.3.0+:
{code:java}
2022-05-19T18:21:08,243 INFO [Command processor]
impl.FsDatasetAsyncDiskService(234): Scheduling blk_1073741840_1016 replica
FinalizedReplica, blk_1073741840_1016, FINALIZED
getNumBytes() = 52
getBytesOnDisk() = 52
getVisibleLength()= 52
getVolume() =
/Users/stack/checkouts/hbase.apache.git/hbase-server/target/test-data/d544dd1e-b42d-8fae-aa9a-99e3eb52f61c/cluster_e8660d1b-733a-b023-2e91-dc3f951cf189/dfs/data/data2
getBlockURI() =
file:/Users/stack/checkouts/hbase.apache.git/hbase-server/target/test-data/d544dd1e-b42d-8fae-aa9a-99e3eb52f61c/cluster_e8660d1b-733a-b023-2e91-dc3f951cf189/dfs/data/data2/current/BP-62743752-127.0.0.1-1653009535881/current/finalized/subdir0/subdir0/blk_1073741840
for deletion
2022-05-19T18:21:08,243 DEBUG [IPC Server handler 0 on default port 54774]
metrics.TopMetrics(134): a metric is reported: cmd: delete user: stack.hfs.0
(auth:SIMPLE)
2022-05-19T18:21:08,243 DEBUG [IPC Server handler 0 on default port 54774]
top.TopAuditLogger(78): ------------------- logged event for top service:
allowed=true ugi=stack.hfs.0 (auth:SIMPLE) ip=/127.0.0.1 cmd=delete
src=/user/stack/test-data/b8167d53-bcd7-c682-a767-55faaf7f3e96/data/default/t1/4499521075f51d5138fe4f1916daf92d/.tmp
dst=null perm=null
2022-05-19T18:21:08,243 DEBUG [PacketResponder:
BP-62743752-127.0.0.1-1653009535881:blk_1073741830_1006, type=LAST_IN_PIPELINE]
datanode.BlockReceiver$PacketResponder(1645): PacketResponder:
BP-62743752-127.0.0.1-1653009535881:blk_1073741830_1006, type=LAST_IN_PIPELINE,
replyAck=seqno: 901 reply: SUCCESS downstreamAckTimeNanos: 0 flag: 0
2022-05-19T18:21:08,243 DEBUG [PacketResponder:
BP-62743752-127.0.0.1-1653009535881:blk_1073741830_1006, type=LAST_IN_PIPELINE]
datanode.BlockReceiver$PacketResponder(1327): PacketResponder:
BP-62743752-127.0.0.1-1653009535881:blk_1073741830_1006, type=LAST_IN_PIPELINE:
seqno=-2 waiting for local datanode to finish write.
2022-05-19T18:21:08,243 ERROR [Command processor]
datanode.BPServiceActor$CommandProcessingThread(1276): Command processor
encountered fatal exception and exit.
java.lang.IllegalThreadStateException: null
at java.lang.ThreadGroup.addUnstarted(ThreadGroup.java:865) ~[?:?]
at java.lang.Thread.<init>(Thread.java:430) ~[?:?]
at java.lang.Thread.<init>(Thread.java:704) ~[?:?]
at java.lang.Thread.<init>(Thread.java:525) ~[?:?]
at
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetAsyncDiskService$1.newThread(FsDatasetAsyncDiskService.java:113)
~[hadoop-hdfs-3.2.3.jar:?]
at
java.util.concurrent.ThreadPoolExecutor$Worker.<init>(ThreadPoolExecutor.java:623)
~[?:?]
at
java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:912)
~[?:?]
at
java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1343)
~[?:?]
at
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetAsyncDiskService.execute(FsDatasetAsyncDiskService.java:189)
~[hadoop-hdfs-3.2.3.jar:?]
at
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetAsyncDiskService.deleteAsync(FsDatasetAsyncDiskService.java:238)
~[hadoop-hdfs-3.2.3.jar:?]
at
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl.invalidate(FsDatasetImpl.java:2184)
~[hadoop-hdfs-3.2.3.jar:?]
at
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl.invalidate(FsDatasetImpl.java:2103)
~[hadoop-hdfs-3.2.3.jar:?]
at
org.apache.hadoop.hdfs.server.datanode.BPOfferService.processCommandFromActive(BPOfferService.java:736)
~[hadoop-hdfs-3.2.3.jar:?]
at
org.apache.hadoop.hdfs.server.datanode.BPOfferService.processCommandFromActor(BPOfferService.java:682)
~[hadoop-hdfs-3.2.3.jar:?]
at
org.apache.hadoop.hdfs.server.datanode.BPServiceActor$CommandProcessingThread.processCommand(BPServiceActor.java:1318)
~[hadoop-hdfs-3.2.3.jar:?]
at
org.apache.hadoop.hdfs.server.datanode.BPServiceActor$CommandProcessingThread.lambda$enqueue$2(BPServiceActor.java:1364)
~[hadoop-hdfs-3.2.3.jar:?]
at
org.apache.hadoop.hdfs.server.datanode.BPServiceActor$CommandProcessingThread.processQueue(BPServiceActor.java:1291)
~[hadoop-hdfs-3.2.3.jar:?]
at
org.apache.hadoop.hdfs.server.datanode.BPServiceActor$CommandProcessingThread.run(BPServiceActor.java:1274)
~[hadoop-hdfs-3.2.3.jar:?]
2022-05-19T18:21:08,243 DEBUG [DataXceiver for client
DFSClient_NONMAPREDUCE_1036441577_16 at /127.0.0.1:54879 [Receiving block
BP-62743752-127.0.0.1-1653009535881:blk_1073741830_1006]]
datanode.BlockReceiver(532): Receiving one packet for block
BP-62743752-127.0.0.1-1653009535881:blk_1073741830_1006: PacketHeader with
packetLen=750 header data: offsetInBlock: 495104
seqno: 902
lastPacketInBlock: false
dataLen: 7382022-05-19T18:21:08,243 WARN [Command processor]
datanode.BPServiceActor$CommandProcessingThread(1279): Ending command processor
service for: Thread[Command processor,5,FailOnTimeoutGroup] {code}
Above, we are trying to run a FINALIZED 'command' asynchronously using a thread
from the volume's dedicated executor. The executor is trying to create a thread
because it has none-to-hand as it has not seen action in over
{color:#660e7a}THREADS_KEEP_ALIVE_SECONDS{color} (60seconds) so all live
threads have been let go (The volume executor as configured allows core threads
to die also). The thread creation fails because the
FsDatasetAsyncDiskService#threadGroup we are trying to associate the new thread
with is 'destroyed'. Threadgroups auto-'destroy' themselves after their last
member has
died|[https://github.com/openjdk/jdk11/blob/master/src/java.base/share/classes/java/lang/ThreadGroup.java#L846]|https://github.com/openjdk/jdk11/blob/master/src/java.base/share/classes/java/lang/ThreadGroup.java#L846].]
which can happen given the way this volume executor is configured. This
FsDatasetAsyncDiskService#threadGroup goes unexploited. If no thread group is
supplied, the executor makes a default that internally associates any created
threads with a dedicated executor 'threadgroup' but given how our executor is
configured to let all threads die in the name of economizing on total unning
threads, a threadgroup-for-each-volume-executor is likely to have the same
issue as this FsDatasetAsyncDiskService#threadGroup one. Let me put up a PR to
remove it and undo the cause of the above ITSE.
Of interest perhaps is that this IllegalThreadStateException is not new to
3.2.3/3.0.0+. See the below from 3.2.2 when I run the same downstream test:
{{2022-05-19T17:06:11,140 ERROR [BP-1924619834-10.0.0.192-1653005021952
heartbeating to localhost/127.0.0.1:54360] datanode.BPServiceActor(856):
Exception in BPOfferService for Block pool
BP-1924619834-10.0.0.192-1653005021952 (Datanode Uuid
bb5219c0-a444-4e5a-9455-6176ced7ffe7) service to localhost/127.0.0.1:54360}}
{{java.lang.IllegalThreadStateException: null}}
{{ at java.lang.ThreadGroup.addUnstarted(ThreadGroup.java:865) ~[?:?]}}
{{ at java.lang.Thread.<init>(Thread.java:430) ~[?:?]}}
{{ at java.lang.Thread.<init>(Thread.java:704) ~[?:?]}}
{{ at java.lang.Thread.<init>(Thread.java:525) ~[?:?]}}
{{ at
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetAsyncDiskService$1.newThread(FsDatasetAsyncDiskService.java:105)
~[hadoop-hdfs-3.2.2.jar:?]}}
{{ at
java.util.concurrent.ThreadPoolExecutor$Worker.<init>(ThreadPoolExecutor.java:623)
~[?:?]}}
{{ at
java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:912)
~[?:?]}}
{{ at
java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1343)
~[?:?]}}
{{ at
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetAsyncDiskService.execute(FsDatasetAsyncDiskService.java:181)
~[hadoop-hdfs-3.2.2.jar:?]}}
{{ at
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetAsyncDiskService.deleteAsync(FsDatasetAsyncDiskService.java:230)
~[hadoop-hdfs-3.2.2.jar:?]}}
{{ at
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl.invalidate(FsDatasetImpl.java:2155)
~[hadoop-hdfs-3.2.2.jar:?]}}
{{ at
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl.invalidate(FsDatasetImpl.java:2074)
~[hadoop-hdfs-3.2.2.jar:?]}}
{{ at
org.apache.hadoop.hdfs.server.datanode.BPOfferService.processCommandFromActive(BPOfferService.java:736)
~[hadoop-hdfs-3.2.2.jar:?]}}
{{ at
org.apache.hadoop.hdfs.server.datanode.BPOfferService.processCommandFromActor(BPOfferService.java:682)
~[hadoop-hdfs-3.2.2.jar:?]}}
{{ at
org.apache.hadoop.hdfs.server.datanode.BPServiceActor.processCommand(BPServiceActor.java:888)
~[hadoop-hdfs-3.2.2.jar:?]}}
{{ at
org.apache.hadoop.hdfs.server.datanode.BPServiceActor.offerService(BPServiceActor.java:678)
~[hadoop-hdfs-3.2.2.jar:?]}}
{{ at
org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:854)
~[hadoop-hdfs-3.2.2.jar:?]}}
{{ at java.lang.Thread.run(Thread.java:829) ~[?:?]}}
It too runs into the IllegalThreadStateException.
The difference is HDFS-14997 which nicely made command processing async. It
changed how commands work (of course). Now on an ITSE, the processor shuts down
completely with ERROR. In my test case, the FINALIZED of the block fails and
the procedure waiting on its completion times out, in turn timing out the test.
In the old days, before HDFS-14997, the then synchronus heartbeats would pick
up the ITSE earlier and would just keep retrying in spite of ITSE – the block
finalize happened to complete and the test passed (I did not do deep analysis
of how command-processnig behavior has changed. If interest, I'd be up for
digging in).
{color:#660e7a} {color}
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