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From Batyrshin Alexander <0x62...@gmail.com>
Subject Re: Table dead lock: ERROR 1120 (XCL20): Writes to table blocked until index can be updated
Date Sat, 29 Sep 2018 09:28:34 GMT
Meanwhile we tried to disable regions split via per index table options
'SPLIT_POLICY' => 'org.apache.hadoop.hbase.regionserver.ConstantSizeRegionSplitPolicy'
 and hbase.hregion.max.filesize = 10737418240
Looks like this options set doesn't. Some regions splits at size < 2GB

Then we tried to disable all splits via hbase shell: splitormerge_switch 'SPLIT', false
Seems that this also doesn't work.

Any ideas why we can't disable regions split?

> On 27 Sep 2018, at 02:52, Vincent Poon <vincent.poon.us@gmail.com> wrote:
> 
> We are planning a Phoenix 4.14.1 release which will have this fix
> 
> On Wed, Sep 26, 2018 at 3:36 PM Batyrshin Alexander <0x62ash@gmail.com <mailto:0x62ash@gmail.com>>
wrote:
> Thank you. We will try somehow...
> Is there any chance that this fix will be included in next release for HBASE-1.4 (not
2.0)?
> 
>> On 27 Sep 2018, at 01:04, Ankit Singhal <ankitsinghal59@gmail.com <mailto:ankitsinghal59@gmail.com>>
wrote:
>> 
>> You might be hitting PHOENIX-4785 <https://jira.apache.org/jira/browse/PHOENIX-4785>,
 you can apply the patch on top of 4.14 and see if it fixes your problem.
>> 
>> Regards,
>> Ankit Singhal
>> 
>> On Wed, Sep 26, 2018 at 2:33 PM Batyrshin Alexander <0x62ash@gmail.com <mailto:0x62ash@gmail.com>>
wrote:
>> Any advices? Helps?
>> I can reproduce problem and capture more logs if needed.
>> 
>>> On 21 Sep 2018, at 02:13, Batyrshin Alexander <0x62ash@gmail.com <mailto:0x62ash@gmail.com>>
wrote:
>>> 
>>> Looks like lock goes away 30 minutes after index region split.
>>> So i can assume that this issue comes from cache that configured by this option:
phoenix.coprocessor.maxMetaDataCacheTimeToLiveMs
>>> 
>>> 
>>> 
>>>> On 21 Sep 2018, at 00:15, Batyrshin Alexander <0x62ash@gmail.com <mailto:0x62ash@gmail.com>>
wrote:
>>>> 
>>>> And how this split looks at Master logs:
>>>> 
>>>> Sep 20 19:45:04 prod001 hbase[10838]: 2018-09-20 19:45:04,888 INFO  [AM.ZK.Worker-pool5-t282]
master.RegionStates: Transition {3e44b85ddf407da831dbb9a871496986 state=OPEN, ts=1537304859509,
server=prod013,60020,1537304282885} to {3e44b85ddf407da831dbb9a871496986 state=SPLITTING,
ts=1537461904888, server=prod
>>>> Sep 20 19:45:05 prod001 hbase[10838]: 2018-09-20 19:45:05,340 INFO  [AM.ZK.Worker-pool5-t284]
master.RegionStates: Transition {3e44b85ddf407da831dbb9a871496986 state=SPLITTING, ts=1537461905340,
server=prod013,60020,1537304282885} to {3e44b85ddf407da831dbb9a871496986 state=SPLIT, ts=1537461905340,
server=pro
>>>> Sep 20 19:45:05 prod001 hbase[10838]: 2018-09-20 19:45:05,340 INFO  [AM.ZK.Worker-pool5-t284]
master.RegionStates: Offlined 3e44b85ddf407da831dbb9a871496986 from prod013,60020,1537304282885
>>>> Sep 20 19:45:05 prod001 hbase[10838]: 2018-09-20 19:45:05,341 INFO  [AM.ZK.Worker-pool5-t284]
master.RegionStates: Transition {33cba925c7acb347ac3f5e70e839c3cb state=SPLITTING_NEW, ts=1537461905340,
server=prod013,60020,1537304282885} to {33cba925c7acb347ac3f5e70e839c3cb state=OPEN, ts=1537461905341,
server=
>>>> Sep 20 19:45:05 prod001 hbase[10838]: 2018-09-20 19:45:05,341 INFO  [AM.ZK.Worker-pool5-t284]
master.RegionStates: Transition {acb8f16a004a894c8706f6e12cd26144 state=SPLITTING_NEW, ts=1537461905340,
server=prod013,60020,1537304282885} to {acb8f16a004a894c8706f6e12cd26144 state=OPEN, ts=1537461905341,
server=
>>>> Sep 20 19:45:05 prod001 hbase[10838]: 2018-09-20 19:45:05,343 INFO  [AM.ZK.Worker-pool5-t284]
master.AssignmentManager: Handled SPLIT event; parent=IDX_MARK_O,\x107834005168\x0000000046200020LWfBS4c,1536637905252.3e44b85ddf407da831dbb9a871496986.,
daughter a=IDX_MARK_O,\x107834005168\x0000000046200020LWfBS4c,1
>>>> Sep 20 19:47:41 prod001 hbase[10838]: 2018-09-20 19:47:41,972 INFO  [prod001,60000,1537304851459_ChoreService_2]
balancer.StochasticLoadBalancer: Skipping load balancing because balanced cluster; total cost
is 17.82282205608522, sum multiplier is 1102.0 min cost which need balance is 0.05
>>>> Sep 20 19:47:42 prod001 hbase[10838]: 2018-09-20 19:47:42,021 INFO  [prod001,60000,1537304851459_ChoreService_1]
hbase.MetaTableAccessor: Deleted IDX_MARK_O,\x107834005168\x0000000046200020LWfBS4c,1536637905252.3e44b85ddf407da831dbb9a871496986.
>>>> Sep 20 19:47:42 prod001 hbase[10838]: 2018-09-20 19:47:42,022 INFO  [prod001,60000,1537304851459_ChoreService_1]
master.CatalogJanitor: Scanned 779 catalog row(s), gc'd 0 unreferenced merged region(s) and
1 unreferenced parent region(s)
>>>> 
>>>>> On 20 Sep 2018, at 21:43, Batyrshin Alexander <0x62ash@gmail.com <mailto:0x62ash@gmail.com>>
wrote:
>>>>> 
>>>>> Looks like problem was because of index region split
>>>>> 
>>>>> Index region split at prod013:
>>>>> Sep 20 19:45:05 prod013 hbase[193055]: 2018-09-20 19:45:05,441 INFO 
[regionserver/prod013/10.0.0.13:60020-splits-1537400010677] regionserver.SplitRequest: Region
split, hbase:meta updated, and report to master. Parent=IDX_MARK_O,\x107834005168\x0000000046200020LWfBS4c,1536637905252.3e44b85ddf407da831dbb9a871496986.,
new regions: IDX_MARK_O,\x107834005168\x0000000046200020LWfBS4c,1537461904877.33cba925c7acb347ac3f5e70e839c3cb.,
IDX_MARK_O,\x107834005168\x0000000046200068=4YF!YI,1537461904877.acb8f16a004a894c8706f6e12cd26144..
Split took 0sec
>>>>> Sep 20 19:45:05 prod013 hbase[193055]: 2018-09-20 19:45:05,441 INFO 
[regionserver/prod013/10.0.0.13:60020-splits-1537400010677] regionserver.SplitRequest: Split
transaction journal:
>>>>> Sep 20 19:45:05 prod013 hbase[193055]:         STARTED at 1537461904853
>>>>> Sep 20 19:45:05 prod013 hbase[193055]:         PREPARED at 1537461904877
>>>>> Sep 20 19:45:05 prod013 hbase[193055]:         BEFORE_PRE_SPLIT_HOOK
at 1537461904877
>>>>> Sep 20 19:45:05 prod013 hbase[193055]:         AFTER_PRE_SPLIT_HOOK at
1537461904877
>>>>> Sep 20 19:45:05 prod013 hbase[193055]:         SET_SPLITTING at 1537461904880
>>>>> Sep 20 19:45:05 prod013 hbase[193055]:         CREATE_SPLIT_DIR at 1537461904987
>>>>> Sep 20 19:45:05 prod013 hbase[193055]:         CLOSED_PARENT_REGION at
1537461905002
>>>>> Sep 20 19:45:05 prod013 hbase[193055]:         OFFLINED_PARENT at 1537461905002
>>>>> Sep 20 19:45:05 prod013 hbase[193055]:         STARTED_REGION_A_CREATION
at 1537461905056
>>>>> Sep 20 19:45:05 prod013 hbase[193055]:         STARTED_REGION_B_CREATION
at 1537461905131
>>>>> Sep 20 19:45:05 prod013 hbase[193055]:         PONR at 1537461905192
>>>>> Sep 20 19:45:05 prod013 hbase[193055]:         OPENED_REGION_A at 1537461905249
>>>>> Sep 20 19:45:05 prod013 hbase[193055]:         OPENED_REGION_B at 1537461905252
>>>>> Sep 20 19:45:05 prod013 hbase[193055]:         BEFORE_POST_SPLIT_HOOK
at 1537461905439
>>>>> Sep 20 19:45:05 prod013 hbase[193055]:         AFTER_POST_SPLIT_HOOK
at 1537461905439
>>>>> Sep 20 19:45:05 prod013 hbase[193055]:         COMPLETED at 1537461905439
>>>>> 
>>>>> Index update failed at prod002:
>>>>> Sep 20 20:09:24 prod002 hbase[97285]: 2018-09-20 20:09:24,520 WARN  [hconnection-0x4f3242a0-shared--pool32-t36014]
client.AsyncProcess: #220, table=IDX_MARK_O, attempt=1/1 failed=1ops, last exception: org.apache.hadoop.hbase.NotServingRegionException:
org.apache.hadoop.hbase.NotServingRegionException: Re
>>>>> gion IDX_MARK_O,\x107834005168\x0000000046200020LWfBS4c,1536637905252.3e44b85ddf407da831dbb9a871496986.
is not online on prod013,60020,1537304282885
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.hadoop.hbase.regionserver.HRegionServer.getRegionByEncodedName(HRegionServer.java:3081)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.hadoop.hbase.regionserver.RSRpcServices.getRegion(RSRpcServices.java:1271)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.hadoop.hbase.regionserver.RSRpcServices.multi(RSRpcServices.java:2365)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:36621)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2359)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:124)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:297)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:277)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:  on prod013,60020,1537304282885,
tracking started Thu Sep 20 20:09:24 MSK 2018; not retrying 1 - final failure
>>>>> Sep 20 20:09:24 prod002 hbase[97285]: 2018-09-20 20:09:24,549 INFO  [RpcServer.default.FPBQ.Fifo.handler=98,queue=8,port=60020]
zookeeper.RecoverableZooKeeper: Process identifier=hconnection-0x39beae45 connecting to ZooKeeper
ensemble=10.0.0.1:2181 <http://10.0.0.1:2181/>,10.0.0.2:2181 <http://10.0.0.2:2181/>,10.0.0.3:2181
<http://10.0.0.3:2181/>
>>>>> Sep 20 20:09:24 prod002 hbase[97285]: 2018-09-20 20:09:24,549 INFO  [RpcServer.default.FPBQ.Fifo.handler=98,queue=8,port=60020]
zookeeper.ZooKeeper: Initiating client connection, connectString=10.0.0.1:2181 <http://10.0.0.1:2181/>,10.0.0.2:2181
<http://10.0.0.2:2181/>,10.0.0.3:2181 <http://10.0.0.3:2181/> sessionTimeout=90000
watcher=org.apache.hadoop.hbase.zookeeper.PendingWatcher@3ef61f7
>>>>> Sep 20 20:09:24 prod002 hbase[97285]: 2018-09-20 20:09:24,562 INFO  [RpcServer.default.FPBQ.Fifo.handler=98,queue=8,port=60020-SendThread(10.0.0.3:2181
<http://10.0.0.3:2181/>)] zookeeper.ClientCnxn: Opening socket connection to server
10.0.0.3/10.0.0.3:2181 <http://10.0.0.3/10.0.0.3:2181>. Will not attempt to authenticate
using SASL (unknown error)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]: 2018-09-20 20:09:24,570 INFO  [RpcServer.default.FPBQ.Fifo.handler=98,queue=8,port=60020-SendThread(10.0.0.3:2181
<http://10.0.0.3:2181/>)] zookeeper.ClientCnxn: Socket connection established to 10.0.0.3/10.0.0.3:2181
<http://10.0.0.3/10.0.0.3:2181>, initiating session
>>>>> Sep 20 20:09:24 prod002 hbase[97285]: 2018-09-20 20:09:24,572 INFO  [RpcServer.default.FPBQ.Fifo.handler=98,queue=8,port=60020-SendThread(10.0.0.3:2181
<http://10.0.0.3:2181/>)] zookeeper.ClientCnxn: Session establishment complete on server
10.0.0.3/10.0.0.3:2181 <http://10.0.0.3/10.0.0.3:2181>, sessionid = 0x30000e039e01c7f,
negotiated timeout = 40000
>>>>> Sep 20 20:09:24 prod002 hbase[97285]: 2018-09-20 20:09:24,628 INFO  [RpcServer.default.FPBQ.Fifo.handler=98,queue=8,port=60020]
index.PhoenixIndexFailurePolicy: Successfully update INDEX_DISABLE_TIMESTAMP for IDX_MARK_O
due to an exception while writing updates. indexState=PENDING_DISABLE
>>>>> Sep 20 20:09:24 prod002 hbase[97285]: org.apache.phoenix.hbase.index.exception.MultiIndexWriteFailureException:
 disableIndexOnFailure=true, Failed to write to multiple index tables: [IDX_MARK_O]
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.phoenix.hbase.index.write.TrackingParallelWriterIndexCommitter.write(TrackingParallelWriterIndexCommitter.java:235)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.phoenix.hbase.index.write.IndexWriter.write(IndexWriter.java:195)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.phoenix.hbase.index.write.IndexWriter.writeAndKillYourselfOnFailure(IndexWriter.java:156)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.phoenix.hbase.index.write.IndexWriter.writeAndKillYourselfOnFailure(IndexWriter.java:145)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.phoenix.hbase.index.Indexer.doPostWithExceptions(Indexer.java:620)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.phoenix.hbase.index.Indexer.doPost(Indexer.java:595)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.phoenix.hbase.index.Indexer.postBatchMutateIndispensably(Indexer.java:578)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost$37.call(RegionCoprocessorHost.java:1048)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost$RegionOperation.call(RegionCoprocessorHost.java:1711)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.execOperation(RegionCoprocessorHost.java:1789)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.execOperation(RegionCoprocessorHost.java:1745)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.postBatchMutateIndispensably(RegionCoprocessorHost.java:1044)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.hadoop.hbase.regionserver.HRegion.doMiniBatchMutation(HRegion.java:3646)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.hadoop.hbase.regionserver.HRegion.batchMutate(HRegion.java:3108)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.hadoop.hbase.regionserver.HRegion.batchMutate(HRegion.java:3050)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.hadoop.hbase.regionserver.RSRpcServices.doBatchOp(RSRpcServices.java:916)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.hadoop.hbase.regionserver.RSRpcServices.doNonAtomicRegionMutation(RSRpcServices.java:844)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.hadoop.hbase.regionserver.RSRpcServices.multi(RSRpcServices.java:2405)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:36621)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2359)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:124)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:297)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]:         at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:277)
>>>>> Sep 20 20:09:24 prod002 hbase[97285]: 2018-09-20 20:09:24,632 INFO  [RpcServer.default.FPBQ.Fifo.handler=98,queue=8,port=60020]
util.IndexManagementUtil: Rethrowing org.apache.hadoop.hbase.DoNotRetryIOException: ERROR
1121 (XCL21): Write to the index failed.  disableIndexOnFailure=true, Failed to write to multiple
index tables: [IDX_MARK_O] ,serverTimestamp=1537463364504,
>>>>> 
>>>>> 
>>>>>> On 20 Sep 2018, at 21:01, Batyrshin Alexander <0x62ash@gmail.com
<mailto:0x62ash@gmail.com>> wrote:
>>>>>> 
>>>>>> Our setup:
>>>>>> HBase-1.4.7
>>>>>> Phoenix-4.14-hbase-1.4
>>>>>> 
>>>>>> 
>>>>>>> On 20 Sep 2018, at 20:19, Batyrshin Alexander <0x62ash@gmail.com
<mailto:0x62ash@gmail.com>> wrote:
>>>>>>> 
>>>>>>>  Hello,
>>>>>>> Looks live we got dead lock with repeating "ERROR 1120 (XCL20)"
exception. At this time all indexes is ACTIVE.
>>>>>>> Can you help to make deeper diagnose?
>>>>>>> 
>>>>>>> java.sql.SQLException: ERROR 1120 (XCL20): Writes to table blocked
until index can be updated. tableName=TBL_MARK
>>>>>>> 	at org.apache.phoenix.exception.SQLExceptionCode$Factory$1.newException(SQLExceptionCode.java:494)
>>>>>>> 	at org.apache.phoenix.exception.SQLExceptionInfo.buildException(SQLExceptionInfo.java:150)
>>>>>>> 	at org.apache.phoenix.execute.MutationState.validateAndGetServerTimestamp(MutationState.java:815)
>>>>>>> 	at org.apache.phoenix.execute.MutationState.validateAll(MutationState.java:789)
>>>>>>> 	at org.apache.phoenix.execute.MutationState.send(MutationState.java:981)
>>>>>>> 	at org.apache.phoenix.execute.MutationState.send(MutationState.java:1514)
>>>>>>> 	at org.apache.phoenix.execute.MutationState.commit(MutationState.java:1337)
>>>>>>> 	at org.apache.phoenix.jdbc.PhoenixConnection$3.call(PhoenixConnection.java:670)
>>>>>>> 	at org.apache.phoenix.jdbc.PhoenixConnection$3.call(PhoenixConnection.java:666)
>>>>>>> 	at org.apache.phoenix.call.CallRunner.run(CallRunner.java:53)
>>>>>>> 	at org.apache.phoenix.jdbc.PhoenixConnection.commit(PhoenixConnection.java:666)
>>>>>>> 	at x.persistence.phoenix.PhoenixDao.$anonfun$doUpsert$1(PhoenixDao.scala:103)
>>>>>>> 	at scala.util.Try$.apply(Try.scala:209)
>>>>>>> 	at x.persistence.phoenix.PhoenixDao.doUpsert(PhoenixDao.scala:101)
>>>>>>> 	at x.persistence.phoenix.PhoenixDao.$anonfun$batchInsert$2(PhoenixDao.scala:45)
>>>>>>> 	at x.persistence.phoenix.PhoenixDao.$anonfun$batchInsert$2$adapted(PhoenixDao.scala:45)
>>>>>>> 	at scala.collection.immutable.Stream.flatMap(Stream.scala:486)
>>>>>>> 	at scala.collection.immutable.Stream.$anonfun$flatMap$1(Stream.scala:494)
>>>>>>> 	at scala.collection.immutable.Stream.$anonfun$append$1(Stream.scala:252)
>>>>>>> 	at scala.collection.immutable.Stream$Cons.tail(Stream.scala:1169)
>>>>>>> 	at scala.collection.immutable.Stream$Cons.tail(Stream.scala:1159)
>>>>>>> 	at scala.collection.immutable.Stream.length(Stream.scala:309)
>>>>>>> 	at scala.collection.SeqLike.size(SeqLike.scala:105)
>>>>>>> 	at scala.collection.SeqLike.size$(SeqLike.scala:105)
>>>>>>> 	at scala.collection.AbstractSeq.size(Seq.scala:41)
>>>>>>> 	at scala.collection.TraversableOnce.toArray(TraversableOnce.scala:285)
>>>>>>> 	at scala.collection.TraversableOnce.toArray$(TraversableOnce.scala:283)
>>>>>>> 	at scala.collection.AbstractTraversable.toArray(Traversable.scala:104)
>>>>>>> 	at x.persistence.phoenix.PhoenixDao.$anonfun$batchInsert$1(PhoenixDao.scala:45)
>>>>>>> 	at scala.util.Try$.apply(Try.scala:209)
>>>>>>> 	at x.persistence.phoenix.PhoenixDao.batchInsert(PhoenixDao.scala:45)
>>>>>>> 	at x.persistence.phoenix.PhoenixDao.$anonfun$insert$2(PhoenixDao.scala:35)
>>>>>>> 	at scala.concurrent.Future$.$anonfun$apply$1(Future.scala:655)
>>>>>>> 	at scala.util.Success.$anonfun$map$1(Try.scala:251)
>>>>>>> 	at scala.util.Success.map(Try.scala:209)
>>>>>>> 	at scala.concurrent.Future.$anonfun$map$1(Future.scala:289)
>>>>>>> 	at scala.concurrent.impl.Promise.liftedTree1$1(Promise.scala:29)
>>>>>>> 	at scala.concurrent.impl.Promise.$anonfun$transform$1(Promise.scala:29)
>>>>>>> 	at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:60)
>>>>>>> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
>>>>>>> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
>>>>>>> 	at java.lang.Thread.run(Thread.java:748)
>>>>>>> 
>>>>>>> 
>>>>>> 
>>>>> 
>>>> 
>>> 
>> 
> 


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