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From: Fabrice Larcher <fabrice.larcher@level5.fr>
Date: Thu, 10 Jul 2014 10:09:27 +0200
Message-ID: 
 <CAHvupe-thEu9ZSW8otvv9mhf5VH+vsrDNF1dXt+H__UtnxOvqA@mail.gmail.com>
Subject: C* 2.1-rc2 gets unstable after a 'DROP KEYSPACE' command ?
To: user@cassandra.apache.org
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=E2=80=8BHello,

I am using the 'development' version 2.1-rc2.

With one node (=3Dlocalhost), I get timeouts trying to connect to C* after
running a 'DROP KEYSPACE' command. I have following error messages in
system.log :

INFO  [SharedPool-Worker-3] 2014-07-09 16:29:36,578
MigrationManager.java:319 - Drop Keyspace 'test_main'
(...)
ERROR [MemtableFlushWriter:6] 2014-07-09 16:29:37,178
CassandraDaemon.java:166 - Exception in thread
Thread[MemtableFlushWriter:6,5,main]
java.lang.RuntimeException: Last written key
DecoratedKey(91e7f660-076f-11e4-a36d-28d2444c0b1b,
52446dde90244ca49789b41671e4ca7c) >=3D current key
DecoratedKey(91e7f660-076f-11e4-a36d-28d2444c0b1b,
52446dde90244ca49789b41671e4ca7c) writing into
./../data/data/test_main/user-911d5360076f11e4812d3d4ba97474ac/test_main-us=
er.user_account-tmp-ka-1-Data.db
        at
org.apache.cassandra.io.sstable.SSTableWriter.beforeAppend(SSTableWriter.ja=
va:172)
~[apache-cassandra-2.1.0-rc2.jar:2.1.0-rc2]
        at
org.apache.cassandra.io.sstable.SSTableWriter.append(SSTableWriter.java:215=
)
~[apache-cassandra-2.1.0-rc2.jar:2.1.0-rc2]
        at
org.apache.cassandra.db.Memtable$FlushRunnable.writeSortedContents(Memtable=
.java:351)
~[apache-cassandra-2.1.0-rc2.jar:2.1.0-rc2]
        at
org.apache.cassandra.db.Memtable$FlushRunnable.runWith(Memtable.java:314)
~[apache-cassandra-2.1.0-rc2.jar:2.1.0-rc2]
        at
org.apache.cassandra.io.util.DiskAwareRunnable.runMayThrow(DiskAwareRunnabl=
e.java:48)
~[apache-cassandra-2.1.0-rc2.jar:2.1.0-rc2]
        at
org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28)
~[apache-cassandra-2.1.0-rc2.jar:2.1.0-rc2]
        at
com.google.common.util.concurrent.MoreExecutors$SameThreadExecutorService.e=
xecute(MoreExecutors.java:297)
~[guava-16.0.jar:na]
        at
org.apache.cassandra.db.ColumnFamilyStore$Flush.run(ColumnFamilyStore.java:=
1054)
~[apache-cassandra-2.1.0-rc2.jar:2.1.0-rc2]
        at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1=
145)
~[na:1.7.0_55]
        at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:=
615)
~[na:1.7.0_55]
        at java.lang.Thread.run(Thread.java:744) ~[na:1.7.0_55]

Then, I can not connect to the Cluster anymore from my app (Java Driver
2.1-SNAPSHOT) and got in application logs :

com.datastax.driver.core.exceptions.NoHostAvailableException: All host(s)
tried for query failed (tried: /127.0.0.1:9042
(com.datastax.driver.core.exceptions.DriverException: Timeout during read))
    at
com.datastax.driver.core.exceptions.NoHostAvailableException.copy(NoHostAva=
ilableException.java:65)
    at
com.datastax.driver.core.DefaultResultSetFuture.extractCauseFromExecutionEx=
ception(DefaultResultSetFuture.java:258)
    at
com.datastax.driver.core.DefaultResultSetFuture.getUninterruptibly(DefaultR=
esultSetFuture.java:174)
    at
com.datastax.driver.core.AbstractSession.execute(AbstractSession.java:52)
    at
com.datastax.driver.core.AbstractSession.execute(AbstractSession.java:36)
    (...)
Caused by: com.datastax.driver.core.exceptions.NoHostAvailableException:
All host(s) tried for query failed (tried: /127.0.0.1:9042
(com.datastax.driver.core.exceptions.DriverException: Timeout during read))
    at
com.datastax.driver.core.RequestHandler.sendRequest(RequestHandler.java:103=
)
    at
com.datastax.driver.core.RequestHandler$1.run(RequestHandler.java:175)
    at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1=
145)
    at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:=
615)
    at java.lang.Thread.run(Thread.java:745)

I can still connect through CQLSH but if I run (again) a "DROP KEYSPACE"
command from CQLSH, I get the following error :
errors=3D{}, last_host=3D127.0.0.1

Now, on a 2 nodes cluster I also have a similar issue but the error's
stacktrace is different :

>From application logs :

17971 [Cassandra Java Driver worker-2] WARN
com.datastax.driver.core.Cluster  - No schema agreement from live replicas
after 10000 ms. The schema may not be up to date on some nodes.

>From system.log :

INFO  [SharedPool-Worker-2] 2014-07-10 09:04:53,434
MigrationManager.java:319 - Drop Keyspace 'test_main'
(...)
ERROR [MigrationStage:1] 2014-07-10 09:04:56,553
CommitLogSegmentManager.java:304 - Failed waiting for a forced recycle of
in-use commit log segments
java.lang.AssertionError: null
        at
org.apache.cassandra.db.commitlog.CommitLogSegmentManager.forceRecycleAll(C=
ommitLogSegmentManager.java:299)
~[apache-cassandra-2.1.0-rc2.jar:2.1.0-rc2]
        at
org.apache.cassandra.db.commitlog.CommitLog.forceRecycleAllSegments(CommitL=
og.java:160)
[apache-cassandra-2.1.0-rc2.jar:2.1.0-rc2]
        at
org.apache.cassandra.db.DefsTables.dropColumnFamily(DefsTables.java:516)
[apache-cassandra-2.1.0-rc2.jar:2.1.0-rc2]
        at
org.apache.cassandra.db.DefsTables.mergeColumnFamilies(DefsTables.java:300)
[apache-cassandra-2.1.0-rc2.jar:2.1.0-rc2]
        at
org.apache.cassandra.db.DefsTables.mergeSchemaInternal(DefsTables.java:187)
[apache-cassandra-2.1.0-rc2.jar:2.1.0-rc2]
        at
org.apache.cassandra.db.DefsTables.mergeSchema(DefsTables.java:164)
[apache-cassandra-2.1.0-rc2.jar:2.1.0-rc2]
        at
org.apache.cassandra.service.MigrationManager$2.runMayThrow(MigrationManage=
r.java:393)
[apache-cassandra-2.1.0-rc2.jar:2.1.0-rc2]
        at
org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28)
[apache-cassandra-2.1.0-rc2.jar:2.1.0-rc2]
        at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
[na:1.7.0_45]
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
[na:1.7.0_45]
        at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1=
145)
[na:1.7.0_45]
        at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:=
615)
[na:1.7.0_45]
        at java.lang.Thread.run(Thread.java:744) [na:1.7.0_45]


In both cases, I have to restart the C* server, so that I can connect again
from my application. The connection from CQLSH is still possible but some
key-space related commands fail.

NB : I also get sometimes the following error on my nodes (I do not know if
there is any link with the topic) :
ERROR [CompactionExecutor:62] 2014-07-10 08:49:02,059
CassandraDaemon.java:166 - Exception in thread
Thread[CompactionExecutor:62,1,main]
java.lang.NullPointerException: null
        at
org.apache.cassandra.cache.CounterCacheKey.getPathInfo(CounterCacheKey.java=
:53)
~[apache-cassandra-2.1.0-rc2.jar:2.1.0-rc2]
        at
org.apache.cassandra.cache.AutoSavingCache$Writer.saveCache(AutoSavingCache=
.java:215)
~[apache-cassandra-2.1.0-rc2.jar:2.1.0-rc2]
        at
org.apache.cassandra.db.compaction.CompactionManager$11.run(CompactionManag=
er.java:1052)
~[apache-cassandra-2.1.0-rc2.jar:2.1.0-rc2]
        at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
~[na:1.7.0_55]
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
~[na:1.7.0_55]
        at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1=
145)
~[na:1.7.0_55]
        at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:=
615)
[na:1.7.0_55]
        at java.lang.Thread.run(Thread.java:744) [na:1.7.0_55]

It seems to be a bug (is it known ?). Or do you have any clue on how I can
solve that ?

Thanks for your help

Fabrice

--047d7bd914822c38d404fdd25977
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div dir=3D"ltr"><font><div class=3D"gmail_default" style=
=3D"font-family:verdana,sans-serif;display:inline">=E2=80=8BHello,<br><br>I=
 am using the &#39;development&#39; version 2.1-rc2.<br><br>With one node (=
=3Dlocalhost), I get timeouts trying to connect to C* after running a &#39;=
DROP KEYSPACE&#39; command. I have following error messages in system.log :=
<br>

<br>INFO=C2=A0 [SharedPool-Worker-3] 2014-07-09 16:29:36,578 MigrationManag=
er.java:319 - Drop Keyspace &#39;test_main&#39;<br>(...)<br>ERROR [Memtable=
FlushWriter:6] 2014-07-09 16:29:37,178 CassandraDaemon.java:166 - Exception=
 in thread Thread[MemtableFlushWriter:6,5,main]<br>

java.lang.RuntimeException: Last written key DecoratedKey(91e7f660-076f-11e=
4-a36d-28d2444c0b1b, 52446dde90244ca49789b41671e4ca7c) &gt;=3D current key =
DecoratedKey(91e7f660-076f-11e4-a36d-28d2444c0b1b, 52446dde90244ca49789b416=
71e4ca7c) writing into ./../data/data/test_main/user-911d5360076f11e4812d3d=
4ba97474ac/test_main-user.user_account-tmp-ka-1-Data.db<br>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.apache.cassandra.io.sstab=
le.SSTableWriter.beforeAppend(SSTableWriter.java:172) ~[apache-cassandra-2.=
1.0-rc2.jar:2.1.0-rc2]<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org=
.apache.cassandra.io.sstable.SSTableWriter.append(SSTableWriter.java:215) ~=
[apache-cassandra-2.1.0-rc2.jar:2.1.0-rc2]<br>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.apache.cassandra.db.Memta=
ble$FlushRunnable.writeSortedContents(Memtable.java:351) ~[apache-cassandra=
-2.1.0-rc2.jar:2.1.0-rc2]<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at =
org.apache.cassandra.db.Memtable$FlushRunnable.runWith(Memtable.java:314) ~=
[apache-cassandra-2.1.0-rc2.jar:2.1.0-rc2]<br>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.apache.cassandra.io.util.=
DiskAwareRunnable.runMayThrow(DiskAwareRunnable.java:48) ~[apache-cassandra=
-2.1.0-rc2.jar:2.1.0-rc2]<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at =
org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28) ~[a=
pache-cassandra-2.1.0-rc2.jar:2.1.0-rc2]<br>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at com.google.common.util.concur=
rent.MoreExecutors$SameThreadExecutorService.execute(MoreExecutors.java:297=
) ~[guava-16.0.jar:na]<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org=
.apache.cassandra.db.ColumnFamilyStore$Flush.run(ColumnFamilyStore.java:105=
4) ~[apache-cassandra-2.1.0-rc2.jar:2.1.0-rc2]<br>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at java.util.concurrent.ThreadPo=
olExecutor.runWorker(ThreadPoolExecutor.java:1145) ~[na:1.7.0_55]<br>=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at java.util.concurrent.ThreadPoolExec=
utor$Worker.run(ThreadPoolExecutor.java:615) ~[na:1.7.0_55]<br>=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at java.lang.Thread.run(Thread.java:744) ~[n=
a:1.7.0_55]<br>

<br>Then, I can not connect to the Cluster anymore from my app (Java Driver=
 2.1-SNAPSHOT) and got in application logs :<br><br>com.datastax.driver.cor=
e.exceptions.NoHostAvailableException: All host(s) tried for query failed (=
tried: /<a href=3D"http://127.0.0.1:9042">127.0.0.1:9042</a> (com.datastax.=
driver.core.exceptions.DriverException: Timeout during read))<br>

=C2=A0=C2=A0=C2=A0 at com.datastax.driver.core.exceptions.NoHostAvailableEx=
ception.copy(NoHostAvailableException.java:65)<br>=C2=A0=C2=A0=C2=A0 at com=
.datastax.driver.core.DefaultResultSetFuture.extractCauseFromExecutionExcep=
tion(DefaultResultSetFuture.java:258)<br>

=C2=A0=C2=A0=C2=A0 at com.datastax.driver.core.DefaultResultSetFuture.getUn=
interruptibly(DefaultResultSetFuture.java:174)<br>=C2=A0=C2=A0=C2=A0 at com=
.datastax.driver.core.AbstractSession.execute(AbstractSession.java:52)<br>=
=C2=A0=C2=A0=C2=A0 at com.datastax.driver.core.AbstractSession.execute(Abst=
ractSession.java:36)<br>

=C2=A0=C2=A0=C2=A0 (...)<br>Caused by: com.datastax.driver.core.exceptions.=
NoHostAvailableException: All host(s) tried for query failed (tried: /<a hr=
ef=3D"http://127.0.0.1:9042">127.0.0.1:9042</a> (com.datastax.driver.core.e=
xceptions.DriverException: Timeout during read))<br>

=C2=A0=C2=A0=C2=A0 at com.datastax.driver.core.RequestHandler.sendRequest(R=
equestHandler.java:103)<br>=C2=A0=C2=A0=C2=A0 at com.datastax.driver.core.R=
equestHandler$1.run(RequestHandler.java:175)<br>=C2=A0=C2=A0=C2=A0 at java.=
util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)<=
br>

=C2=A0=C2=A0=C2=A0 at java.util.concurrent.ThreadPoolExecutor$Worker.run(Th=
readPoolExecutor.java:615)<br>=C2=A0=C2=A0=C2=A0 at java.lang.Thread.run(Th=
read.java:745)<br><br>I can still connect through CQLSH but if I run (again=
) a &quot;DROP KEYSPACE&quot; command from CQLSH, I get the following error=
 :<br>

errors=3D{}, last_host=3D127.0.0.1<br><br>Now, on a 2 nodes cluster I also =
have a similar issue but the error&#39;s stacktrace is different :<br><br>F=
rom application logs :<br><br>17971 [Cassandra Java Driver worker-2] WARN=
=C2=A0 com.datastax.driver.core.Cluster=C2=A0 - No schema agreement from li=
ve replicas after 10000 ms. The schema may not be up to date on some nodes.=
<br>

<br>From system.log :<br><br>INFO=C2=A0 [SharedPool-Worker-2] 2014-07-10 09=
:04:53,434 MigrationManager.java:319 - Drop Keyspace &#39;test_main&#39;<br=
>(...)<br>ERROR [MigrationStage:1] 2014-07-10 09:04:56,553 CommitLogSegment=
Manager.java:304 - Failed waiting for a forced recycle of in-use commit log=
 segments<br>

java.lang.AssertionError: null<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0 at org.apache.cassandra.db.commitlog.CommitLogSegmentManager.forceRecyc=
leAll(CommitLogSegmentManager.java:299) ~[apache-cassandra-2.1.0-rc2.jar:2.=
1.0-rc2]<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.apache.cassan=
dra.db.commitlog.CommitLog.forceRecycleAllSegments(CommitLog.java:160) [apa=
che-cassandra-2.1.0-rc2.jar:2.1.0-rc2]<br>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.apache.cassandra.db.DefsT=
ables.dropColumnFamily(DefsTables.java:516) [apache-cassandra-2.1.0-rc2.jar=
:2.1.0-rc2]<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.apache.cas=
sandra.db.DefsTables.mergeColumnFamilies(DefsTables.java:300) [apache-cassa=
ndra-2.1.0-rc2.jar:2.1.0-rc2]<br>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.apache.cassandra.db.DefsT=
ables.mergeSchemaInternal(DefsTables.java:187) [apache-cassandra-2.1.0-rc2.=
jar:2.1.0-rc2]<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.apache.=
cassandra.db.DefsTables.mergeSchema(DefsTables.java:164) [apache-cassandra-=
2.1.0-rc2.jar:2.1.0-rc2]<br>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.apache.cassandra.service.=
MigrationManager$2.runMayThrow(MigrationManager.java:393) [apache-cassandra=
-2.1.0-rc2.jar:2.1.0-rc2]<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at =
org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28) [ap=
ache-cassandra-2.1.0-rc2.jar:2.1.0-rc2]<br>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at java.util.concurrent.Executor=
s$RunnableAdapter.call(Executors.java:471) [na:1.7.0_45]<br>=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0 at java.util.concurrent.FutureTask.run(FutureTa=
sk.java:262) [na:1.7.0_45]<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at=
 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:=
1145) [na:1.7.0_45]<br>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at java.util.concurrent.ThreadPo=
olExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_45]<br>=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at java.lang.Thread.run(Thread.java:74=
4) [na:1.7.0_45]<br><br><br>In both cases, I have to restart the C* server,=
 so that I can connect again from my application. The connection from CQLSH=
 is still possible but some key-space related commands fail.<br>

<br>NB : I also get sometimes the following error on my nodes (I do not kno=
w if there is any link with the topic) :<br>ERROR [CompactionExecutor:62] 2=
014-07-10 08:49:02,059 CassandraDaemon.java:166 - Exception in thread Threa=
d[CompactionExecutor:62,1,main]<br>

java.lang.NullPointerException: null<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0 at org.apache.cassandra.cache.CounterCacheKey.getPathInfo(Counter=
CacheKey.java:53) ~[apache-cassandra-2.1.0-rc2.jar:2.1.0-rc2]<br>=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.apache.cassandra.cache.AutoSavingC=
ache$Writer.saveCache(AutoSavingCache.java:215) ~[apache-cassandra-2.1.0-rc=
2.jar:2.1.0-rc2]<br>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.apache.cassandra.db.compa=
ction.CompactionManager$11.run(CompactionManager.java:1052) ~[apache-cassan=
dra-2.1.0-rc2.jar:2.1.0-rc2]<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) =
~[na:1.7.0_55]<br>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at java.util.concurrent.FutureTa=
sk.run(FutureTask.java:262) ~[na:1.7.0_55]<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 at java.util.concurrent.ThreadPoolExecutor.runWorker(Thread=
PoolExecutor.java:1145) ~[na:1.7.0_55]<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolE=
xecutor.java:615) [na:1.7.0_55]<br>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at java.lang.Thread.run(Thread.j=
ava:744) [na:1.7.0_55]<br><br>It seems to be a bug (is it known ?). Or do y=
ou have any clue on how I can solve that ?<br><br>Thanks for your help<br><=
br>Fabrice<br></div></font></div>


</div>

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