Return-Path: Delivered-To: apmail-cassandra-user-archive@www.apache.org Received: (qmail 27517 invoked from network); 8 Feb 2011 21:41:23 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 8 Feb 2011 21:41:23 -0000 Received: (qmail 41295 invoked by uid 500); 8 Feb 2011 21:41:17 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 40732 invoked by uid 500); 8 Feb 2011 21:41:16 -0000 Mailing-List: contact user-help@cassandra.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@cassandra.apache.org Delivered-To: mailing list user@cassandra.apache.org Received: (qmail 40463 invoked by uid 99); 8 Feb 2011 21:41:16 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 08 Feb 2011 21:41:16 +0000 X-ASF-Spam-Status: No, hits=2.2 required=5.0 tests=HTML_MESSAGE,MIME_QP_LONG_LINE,RCVD_IN_DNSWL_NONE,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: local policy) Received: from [208.113.200.5] (HELO homiemail-a58.g.dreamhost.com) (208.113.200.5) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 08 Feb 2011 21:41:11 +0000 Received: from homiemail-a58.g.dreamhost.com (localhost [127.0.0.1]) by homiemail-a58.g.dreamhost.com (Postfix) with ESMTP id 660567D806C for ; Tue, 8 Feb 2011 13:40:49 -0800 (PST) DomainKey-Signature: a=rsa-sha1; c=nofws; d=thelastpickle.com; h=to:from :subject:date:message-id:content-type:mime-version; q=dns; s= thelastpickle.com; b=QNsW7LRSTV7Fqc8jFl0BvFJszvaGdpryz2+9gSpyQM+ s9njUxLPFw7+xUSYVDj5WjU8s0S1QQlcxj/98gs5BwpXId2iQ1KQNcFgz/kEUg0f AjXc/aSErhrj/kxxrSdUFOgl60OiUpl40krOoFfrFf+ZjdXpM7RoQrbelZTPutks = DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=thelastpickle.com; h=to :from:subject:date:message-id:content-type:mime-version; s= thelastpickle.com; bh=VDRJEAe1KXat90Suf2fetXTkqAg=; b=j/Q855N26m wTdwakJ0aLQ4P8qZ4Bg5cIrUsdwa6u6w1kRUwDxht9pW+RF5mVi5RN7HK9I4gElE kccgy97Kbt6LwZziCgAslOoH9Q13QFdmxSvKJnCWRh6xD64GMMa2grvYYZaGqmiR zi4m/NAxXYVfvT6w4/d4cMzQL+saBD1sE= Received: from localhost (webms.mac.com [17.148.16.116]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: aaron@thelastpickle.com) by homiemail-a58.g.dreamhost.com (Postfix) with ESMTPSA id 200757D806A for ; Tue, 8 Feb 2011 13:40:49 -0800 (PST) To: Cassandra User From: Aaron Morton Subject: error casting Column to SuperColumn during compaction. ? CASSANDRA-1992 ? Date: Tue, 08 Feb 2011 21:40:48 GMT X-Mailer: MobileMe Mail (1C3224) Message-id: Content-Type: multipart/alternative; boundary=Apple-Webmail-42--6ada3ab1-eaff-c53f-814a-c14258773c66 MIME-Version: 1.0 --Apple-Webmail-42--6ada3ab1-eaff-c53f-814a-c14258773c66 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=ISO-8859-1; format=flowed I got the error below on an newish 0.7.0 cluster with the following...=0A=0A= - no schema changes.=A0=0A- original RF at 1, changed to 3 via cassandra-c= li and repair run=0A- stable node membership, i.e. no nodes added=A0=0A=0A= Was thinking it may have to do with =A0CASSANDRA-1992 (see=A0http://www.ma= il-archive.com/user@cassandra.apache.org/msg09276.html) but I've not seen = this error associated with that issue before. I can apply the patch or run= the head on the 0.7 branch if that will help.=A0=0A=0AMay be able to dig = into it further later today. (not ruling out me doing stupid things yet)=0A= =0AAaron=0A=0AERROR [CompactionExecutor:1] 2011-02-08 16:59:35,380 Abstrac= tCassandraDaemon.java (line org.apache.cassandra.service.AbstractCassandra= Daemon) Fatal exception in thread Thread[CompactionExecutor:1,1,main]=0Aja= va.lang.ClassCastException: org.apache.cassandra.db.Column cannot be cast = to org.apache.cassandra.db.SuperColumn=0A=A0=A0 =A0 =A0 =A0at org.apache.c= assandra.db.SuperColumnSerializer.serialize(SuperColumn.java:329)=0A=A0=A0= =A0 =A0 =A0at org.apache.cassandra.db.SuperColumnSerializer.serialize(Sup= erColumn.java:313)=0A=A0=A0 =A0 =A0 =A0at org.apache.cassandra.db.ColumnFa= milySerializer.serializeForSSTable(ColumnFamilySerializer.java:87)=0A=A0=A0= =A0 =A0 =A0at org.apache.cassandra.db.ColumnFamilySerializer.serializeWit= hIndexes(ColumnFamilySerializer.java:106)=0A=A0=A0 =A0 =A0 =A0at org.apach= e.cassandra.io.PrecompactedRow.(PrecompactedRow.java:97)=0A=A0=A0 =A0= =A0 =A0at org.apache.cassandra.io.CompactionIterator.getCompactedRow(Comp= actionIterator.java:138)=0A=A0=A0 =A0 =A0 =A0at org.apache.cassandra.io.Co= mpactionIterator.getReduced(CompactionIterator.java:107)=0A=A0=A0 =A0 =A0 = =A0at org.apache.cassandra.io.CompactionIterator.getReduced(CompactionIter= ator.java:42)=0A=A0=A0 =A0 =A0 =A0at org.apache.cassandra.utils.ReducingIt= erator.computeNext(ReducingIterator.java:73)=0A=A0=A0 =A0 =A0 =A0at com.go= ogle.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.jav= a:136)=0A=A0=A0 =A0 =A0 =A0at com.google.common.collect.AbstractIterator.h= asNext(AbstractIterator.java:131)=0A=A0=A0 =A0 =A0 =A0at org.apache.common= s.collections.iterators.FilterIterator.setNextObjecand such starting=A0t(F= ilterIterator.java:183)=0A=A0=A0 =A0 =A0 =A0at org.apache.commons.collecti= ons.iterators.FilterIterator.hasNext(FilterIterator.java:94)=0A=A0=A0 =A0 = =A0 =A0at org.apache.cassandra.db.CompactionManager.doCompaction(Compactio= nManager.java:323)=0A=A0=A0 =A0 =A0 =A0at org.apache.cassandra.db.Compacti= onManager$1.call(CompactionManager.java:122)=0A=A0=A0 =A0 =A0 =A0at org.ap= ache.cassandra.db.CompactionManager$1.call(CompactionManager.java:92)=0A=A0= =A0 =A0 =A0 =A0at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask= java:303)=0A=A0=A0 =A0 =A0 =A0at java.util.concurrent.FutureTask.run(Futu= reTask.java:138)=0A=A0=A0 =A0 =A0 =A0at java.util.concurrent.ThreadPoolExe= cutor$Worker.runTask(ThreadPoolExecutor.java:886)=0A=A0=A0 =A0 =A0 =A0at j= ava.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:= 908)=0A=A0=A0 =A0 =A0 =A0at java.lang.Thread.run(Thread.java:619)=0A=0A=0A= Then after restart started getting...=0A=0A=0AERROR [CompactionExecutor:1]= 2011-02-09 10:39:15,496 PrecompactedRow.java (line org.apache.cassandra.i= o.PrecompactedRow.(PrecompactedRow.java:82)) Skipping row DecoratedK= ey(71445620198865609512646197760056087250, 2f77686174696674686973776572656= d617374657266696c652f746e6e5f73686f74735f3035305f3030352f6d664964) in /loc= al1/cassandra/data/junkbox/ObjectIndex-e-216-Data.db=0Ajava.io.IOException= : Corrupt (negative) value length encountered=0A=A0=A0 =A0 =A0 =A0at org.a= pache.cassandra.utils.FBUtilities.readByteArray(FBUtilities.java:274)=0A=A0= =A0 =A0 =A0 =A0at org.apache.cassandra.db.ColumnSerializer.deserialize(Col= umnSerializer.java:94)=0A=A0=A0 =A0 =A0 =A0at org.apache.cassandra.db.Colu= mnSerializer.deserialize(ColumnSerializer.java:35)=0A=A0=A0 =A0 =A0 =A0at = org.apache.cassandra.db.ColumnFamilySerializer.deserializeColumns(ColumnFa= milySerializer.java:129)=0A=A0=A0 =A0 =A0 =A0at org.apache.cassandra.io.ss= table.SSTableIdentityIterator.getColumnFamilyWithColumns(SSTableIdentityIt= erator.java:137)=0A=A0=A0 =A0 =A0 =A0at org.apache.cassandra.io.Precompact= edRow.(PrecompactedRow.java:78)=0A=A0=A0 =A0 =A0 =A0at org.apache.ca= ssandra.io.CompactionIterator.getCompactedRow(CompactionIterator.java:138)= =0A=A0=A0 =A0 =A0 =A0at org.apache.cassandra.io.CompactionIterator.getRedu= ced(CompactionIterator.java:107)=0A=A0=A0 =A0 =A0 =A0at org.apache.cassand= ra.io.CompactionIterator.getReduced(CompactionIterator.java:42)=0A=A0=A0 =A0= =A0 =A0at org.apache.cassandra.utils.ReducingIterator.computeNext(Reducin= gIterator.java:73)=0A=A0=A0 =A0 =A0 =A0at com.google.common.collect.Abstra= ctIterator.tryToComputeNext(AbstractIterator.java:136)=0A=A0=A0 =A0 =A0 =A0= at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.jav= a:131)=0A=A0=A0 =A0 =A0 =A0at org.apache.commons.collections.iterators.Fil= terIterator.setNextObject(FilterIterator.java:183)=0A=A0=A0 =A0 =A0 =A0at = org.apache.commons.collections.iterators.FilterIterator.hasNext(FilterIter= ator.java:94)=0A=A0=A0 =A0 =A0 =A0at org.apache.cassandra.db.CompactionMan= ager.doCompaction(CompactionManager.java:323)=0A=A0=A0 =A0 =A0 =A0at org.a= pache.cassandra.db.CompactionManager$1.call(CompactionManager.java:122)=0A= =A0=A0 =A0 =A0 =A0at org.apache.cassandra.db.CompactionManager$1.call(Comp= actionManager.java:92)=0A=A0=A0 =A0 =A0 =A0at java.util.concurrent.FutureT= ask$Sync.innerRun(FutureTask.java:303)=0A=A0=A0 =A0 =A0 =A0at java.util.co= ncurrent.FutureTask.run(FutureTask.java:138)=0A=A0=A0 =A0 =A0 =A0at java.u= til.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:8= 86)=0A=A0=A0 =A0 =A0 =A0at java.util.concurrent.ThreadPoolExecutor$Worker.= run(ThreadPoolExecutor.java:908)=0A=A0=A0 =A0 =A0 =A0at java.lang.Thread.r= un(Thread.java:619)=0AERROR [CompactionExecutor:1] 2011-02-09 10:39:15,497= PrecompactedRow.java (line org.apache.cassandra.io.PrecompactedRow.= (PrecompactedRow.java:82)) Skipping row DecoratedKey(714468716962977467497= 86898510505891557, 2f77686174696674686973776572656d617374657266696c652f746= e6e5f73686f74735f6b63685f3032342f6d657461) in /local1/cassandra/data/junkb= ox/ObjectIndex-e-216-Data.db=0Aorg.apache.cassandra.db.ColumnSerializer$Co= rruptColumnException: invalid column name length 0=0A=A0=A0 =A0 =A0 =A0at = org.apache.cassandra.db.ColumnSerializer.deserialize(ColumnSerializer.java= :68)=0A=A0=A0 =A0 =A0 =A0at org.apache.cassandra.db.ColumnSerializer.deser= ialize(ColumnSerializer.java:35)=0A=A0=A0 =A0 =A0 =A0at org.apache.cassand= ra.db.ColumnFamilySerializer.deserializeColumns(ColumnFamilySerializer.jav= a:129)=0A=A0=A0 =A0 =A0 =A0at org.apache.cassandra.io.sstable.SSTableIdent= ityIterator.getColumnFamilyWithColumns(SSTableIdentityIterator.java:137)=0A= =A0=A0 =A0 =A0 =A0at org.apache.cassandra.io.PrecompactedRow.(Precom= pactedRow.java:78)=0A=A0=A0 =A0 =A0 =A0at org.apache.cassandra.io.Compacti= onIterator.getCompactedRow(CompactionIterator.java:138)=0A=A0=A0 =A0 =A0 =A0= at org.apache.cassandra.io.CompactionIterator.getReduced(CompactionIterato= r.java:107)=0A=A0=A0 =A0 =A0 =A0at org.apache.cassandra.io.CompactionItera= tor.getReduced(CompactionIterator.java:42)=0A=A0=A0 =A0 =A0 =A0at org.apac= he.cassandra.utils.ReducingIterator.computeNext(ReducingIterator.java:73)=0A= =A0=A0 =A0 =A0 =A0at com.google.common.collect.AbstractIterator.tryToCompu= teNext(AbstractIterator.java:136)=0A=A0=A0 =A0 =A0 =A0at com.google.common= collect.AbstractIterator.hasNext(AbstractIterator.java:131)=0A=A0=A0 =A0 = =A0 =A0at org.apache.commons.collections.iterators.FilterIterator.setNextO= bject(FilterIterator.java:183)=0A=A0=A0 =A0 =A0 =A0at org.apache.commons.c= ollections.iterators.FilterIterator.hasNext(FilterIterator.java:94)=0A=A0=A0= =A0 =A0 =A0at org.apache.cassandra.db.CompactionManager.doCompaction(Comp= actionManager.java:323)=0A=A0=A0 =A0 =A0 =A0at org.apache.cassandra.db.Com= pactionManager$1.call(CompactionManager.java:122)=0A=A0=A0 =A0 =A0 =A0at o= rg.apache.cassandra.db.CompactionManager$1.call(CompactionManager.java:92)= =0A=A0=A0 =A0 =A0 =A0at java.util.concurrent.FutureTask$Sync.innerRun(Futu= reTask.java:303)=0A=A0=A0 =A0 =A0 =A0at java.util.concurrent.FutureTask.ru= n(FutureTask.java:138)=0A=A0=A0 =A0 =A0 =A0at java.util.concurrent.ThreadP= oolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)=0A=A0=A0 =A0 =A0 =A0= at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.j= ava:908)=0A=A0=A0 =A0 =A0 =A0at java.lang.Thread.run(Thread.java:619)=0A=0A --Apple-Webmail-42--6ada3ab1-eaff-c53f-814a-c14258773c66 Content-Type: multipart/related; type="text/html"; boundary=Apple-Webmail-86--6ada3ab1-eaff-c53f-814a-c14258773c66 --Apple-Webmail-86--6ada3ab1-eaff-c53f-814a-c14258773c66 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=ISO-8859-1;
I got the error below on an newish 0.7.0 cluster with the follow= ing...

- no schema changes. 
- ori= ginal RF at 1, changed to 3 via cassandra-cli and repair run
- s= table node membership, i.e. no nodes added 

= Was thinking it may have to do with  CASSANDRA-1992 (see h= ttp://www.mail-archive.com/user@cassandra.apache.org/msg09276.html) bu= t I've not seen this error associated with that issue before. I can apply = the patch or run the head on the 0.7 branch if that will help. 
=

May be able to dig into it further later today. (not r= uling out me doing stupid things yet)

Aaron
=

ERROR [CompactionExecutor:1] 2011-02-08 16:59:35,380 A= bstractCassandraDaemon.java (line org.apache.cassandra.service.AbstractCas= sandraDaemon) Fatal exception in thread Thread[CompactionExecutor:1,1,main= ]
java.lang.ClassCastException: org.apache.cassandra.db.Column c= annot be cast to org.apache.cassandra.db.SuperColumn
  = ;      at org.apache.cassandra.db.SuperColumnSerializer.ser= ialize(SuperColumn.java:329)
        at= org.apache.cassandra.db.SuperColumnSerializer.serialize(SuperColumn.java:= 313)
        at org.apache.cassandra.db= ColumnFamilySerializer.serializeForSSTable(ColumnFamilySerializer.java:87= )
        at org.apache.cassandra.db.Co= lumnFamilySerializer.serializeWithIndexes(ColumnFamilySerializer.java:106)=
        at org.apache.cassandra.io.Pre= compactedRow.<init>(PrecompactedRow.java:97)
   =      at org.apache.cassandra.io.CompactionIterator.getCompa= ctedRow(CompactionIterator.java:138)
       =  at org.apache.cassandra.io.CompactionIterator.getReduced(CompactionI= terator.java:107)
        at org.apache= cassandra.io.CompactionIterator.getReduced(CompactionIterator.java:42)
        at org.apache.cassandra.utils.Red= ucingIterator.computeNext(ReducingIterator.java:73)
  =      at com.google.common.collect.AbstractIterator.tryToCo= mputeNext(AbstractIterator.java:136)
       =  at com.google.common.collect.AbstractIterator.hasNext(AbstractIterat= or.java:131)
        at org.apache.comm= ons.collections.iterators.FilterIterator.setNextObjecand such starting&nbs= p;t(FilterIterator.java:183)
        at= org.apache.commons.collections.iterators.FilterIterator.hasNext(FilterIte= rator.java:94)
        at org.apache.ca= ssandra.db.CompactionManager.doCompaction(CompactionManager.java:323)
        at org.apache.cassandra.db.Compacti= onManager$1.call(CompactionManager.java:122)
    =    at org.apache.cassandra.db.CompactionManager$1.call(Compacti= onManager.java:92)
        at java.util= concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
 =        at java.util.concurrent.FutureTask.run(FutureTa= sk.java:138)
        at java.util.concu= rrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
=
        at java.util.concurrent.ThreadPoolEx= ecutor$Worker.run(ThreadPoolExecutor.java:908)
   &nbs= p;    at java.lang.Thread.run(Thread.java:619)
<= br>

Then after restart started getting...


ERROR [CompactionExecutor:1] 2011-02= -09 10:39:15,496 PrecompactedRow.java (line org.apache.cassandra.io.Precom= pactedRow.<init>(PrecompactedRow.java:82)) Skipping row DecoratedKey= (71445620198865609512646197760056087250, 2f77686174696674686973776572656d6= 17374657266696c652f746e6e5f73686f74735f3035305f3030352f6d664964) in /local= 1/cassandra/data/junkbox/ObjectIndex-e-216-Data.db
java.io.IOExc= eption: Corrupt (negative) value length encountered
  =      at org.apache.cassandra.utils.FBUtilities.readByteArr= ay(FBUtilities.java:274)
        at org= apache.cassandra.db.ColumnSerializer.deserialize(ColumnSerializer.java:94= )
        at org.apache.cassandra.db.Co= lumnSerializer.deserialize(ColumnSerializer.java:35)
  = ;      at org.apache.cassandra.db.ColumnFamilySerializer.de= serializeColumns(ColumnFamilySerializer.java:129)
   &= nbsp;    at org.apache.cassandra.io.sstable.SSTableIdentityItera= tor.getColumnFamilyWithColumns(SSTableIdentityIterator.java:137)
        at org.apache.cassandra.io.PrecompactedR= ow.<init>(PrecompactedRow.java:78)
     &nb= sp;  at org.apache.cassandra.io.CompactionIterator.getCompactedRow(Co= mpactionIterator.java:138)
        at o= rg.apache.cassandra.io.CompactionIterator.getReduced(CompactionIterator.ja= va:107)
        at org.apache.cassandra= io.CompactionIterator.getReduced(CompactionIterator.java:42)
&n= bsp;       at org.apache.cassandra.utils.ReducingItera= tor.computeNext(ReducingIterator.java:73)
     &n= bsp;  at com.google.common.collect.AbstractIterator.tryToComputeNext(= AbstractIterator.java:136)
        at c= om.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:13= 1)
        at org.apache.commons.collec= tions.iterators.FilterIterator.setNextObject(FilterIterator.java:183)
        at org.apache.commons.collections.i= terators.FilterIterator.hasNext(FilterIterator.java:94)
 &n= bsp;      at org.apache.cassandra.db.CompactionManager.doCo= mpaction(CompactionManager.java:323)
       =  at org.apache.cassandra.db.CompactionManager$1.call(CompactionManage= r.java:122)
        at org.apache.cassa= ndra.db.CompactionManager$1.call(CompactionManager.java:92)
&nbs= p;       at java.util.concurrent.FutureTask$Sync.inner= Run(FutureTask.java:303)
        at jav= a.util.concurrent.FutureTask.run(FutureTask.java:138)
 &nbs= p;      at java.util.concurrent.ThreadPoolExecutor$Worker.r= unTask(ThreadPoolExecutor.java:886)
       &= nbsp;at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecu= tor.java:908)
        at java.lang.Thre= ad.run(Thread.java:619)
ERROR [CompactionExecutor:1] 2011-02-09 = 10:39:15,497 PrecompactedRow.java (line org.apache.cassandra.io.Precompact= edRow.<init>(PrecompactedRow.java:82)) Skipping row DecoratedKey(714= 46871696297746749786898510505891557, 2f77686174696674686973776572656d61737= 4657266696c652f746e6e5f73686f74735f6b63685f3032342f6d657461) in /local1/ca= ssandra/data/junkbox/ObjectIndex-e-216-Data.db
org.apache.cassan= dra.db.ColumnSerializer$CorruptColumnException: invalid column name length= 0
        at org.apache.cassandra.db.C= olumnSerializer.deserialize(ColumnSerializer.java:68)
 &nbs= p;      at org.apache.cassandra.db.ColumnSerializer.deseria= lize(ColumnSerializer.java:35)
        = at org.apache.cassandra.db.ColumnFamilySerializer.deserializeColumns(Colum= nFamilySerializer.java:129)
        at = org.apache.cassandra.io.sstable.SSTableIdentityIterator.getColumnFamilyWit= hColumns(SSTableIdentityIterator.java:137)
     &= nbsp;  at org.apache.cassandra.io.PrecompactedRow.<init>(Precom= pactedRow.java:78)
        at org.apach= e.cassandra.io.CompactionIterator.getCompactedRow(CompactionIterator.java:= 138)
        at org.apache.cassandra.io= CompactionIterator.getReduced(CompactionIterator.java:107)
&nbs= p;       at org.apache.cassandra.io.CompactionIterator= getReduced(CompactionIterator.java:42)
     &nbs= p;  at org.apache.cassandra.utils.ReducingIterator.computeNext(Reduci= ngIterator.java:73)
        at com.goog= le.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:= 136)
        at com.google.common.colle= ct.AbstractIterator.hasNext(AbstractIterator.java:131)
 &nb= sp;      at org.apache.commons.collections.iterators.Filter= Iterator.setNextObject(FilterIterator.java:183)
   &nb= sp;    at org.apache.commons.collections.iterators.FilterIterato= r.hasNext(FilterIterator.java:94)
       &nb= sp;at org.apache.cassandra.db.CompactionManager.doCompaction(CompactionMan= ager.java:323)
        at org.apache.ca= ssandra.db.CompactionManager$1.call(CompactionManager.java:122)
=         at org.apache.cassandra.db.CompactionMana= ger$1.call(CompactionManager.java:92)
      =  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:30= 3)
        at java.util.concurrent.Futu= reTask.run(FutureTask.java:138)
        = ;at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecu= tor.java:886)
        at java.util.conc= urrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:619= )

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