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Posted to notifications@accumulo.apache.org by "John Vines (JIRA)" <ji...@apache.org> on 2013/01/05 00:20:13 UTC
[jira] [Updated] (ACCUMULO-939) WAL get stuck when datanode dies
[ https://issues.apache.org/jira/browse/ACCUMULO-939?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
John Vines updated ACCUMULO-939:
--------------------------------
Environment: hadoop-1.0.1
> WAL get stuck when datanode dies
> --------------------------------
>
> Key: ACCUMULO-939
> URL: https://issues.apache.org/jira/browse/ACCUMULO-939
> Project: Accumulo
> Issue Type: Bug
> Components: tserver
> Affects Versions: 1.5.0
> Environment: hadoop-1.0.1
> Reporter: John Vines
> Assignee: Eric Newton
>
> Attempting to test ACCUMULO-575 with the following test framework:
> Test bench-
> 1 node running hadoop namenode and 1 datanode
> slave noderunning 1 datanode and accumulo stack, with 8GB in memory map
> Running patched version of accumulo with the following aptch to provide helper debug
> {code}Index: server/src/main/java/org/apache/accumulo/server/tabletserver/Compactor.java
> ===================================================================
> --- server/src/main/java/org/apache/accumulo/server/tabletserver/Compactor.java (revision 1429057)
> +++ server/src/main/java/org/apache/accumulo/server/tabletserver/Compactor.java (working copy)
> @@ -81,6 +81,7 @@
> private FileSystem fs;
> protected KeyExtent extent;
> private List<IteratorSetting> iterators;
> + protected boolean minor= false;
>
> Compactor(Configuration conf, FileSystem fs, Map<String,DataFileValue> files, InMemoryMap imm, String outputFile, boolean propogateDeletes,
> TableConfiguration acuTableConf, KeyExtent extent, CompactionEnv env, List<IteratorSetting> iterators) {
> @@ -158,7 +159,7 @@
> log.error("Verification of successful compaction fails!!! " + extent + " " + outputFile, ex);
> throw ex;
> }
> -
> + log.info("Just completed minor? " + minor + " for table " + extent.getTableId());
> log.debug(String.format("Compaction %s %,d read | %,d written | %,6d entries/sec | %6.3f secs", extent, majCStats.getEntriesRead(),
> majCStats.getEntriesWritten(), (int) (majCStats.getEntriesRead() / ((t2 - t1) / 1000.0)), (t2 - t1) / 1000.0));
>
> Index: server/src/main/java/org/apache/accumulo/server/tabletserver/MinorCompactor.java
> ===================================================================
> --- server/src/main/java/org/apache/accumulo/server/tabletserver/MinorCompactor.java (revision 1429057)
> +++ server/src/main/java/org/apache/accumulo/server/tabletserver/MinorCompactor.java (working copy)
> @@ -88,6 +88,7 @@
>
> do {
> try {
> + this.minor = true;
> CompactionStats ret = super.call();
>
> // log.debug(String.format("MinC %,d recs in | %,d recs out | %,d recs/sec | %6.3f secs | %,d bytes ",map.size(), entriesCompacted,
> {code}
> I stood up a new instance, create a table named test. Ran the following -
> {code}tail -f accumulo-1.5.0-SNAPSHOT/logs/tserver_slave.debug.log | ./ifttt.sh {code}
> where ifttt.sh is
> {code} #!/bin/sh
> dnpid=`jps -m | grep DataNode | awk '{print $1}'`
> while [ -z "" ]; do
> if [ -e $1 ] ;then read str; else str=$1;fi
> if [ -n "`echo $str | grep "Just completed minor? true for table 2"`" ]; then
> echo "I'm gonna kill datanode, pid $dnpid"
> kill -9 $dnpid
> fi
> done
> {code}
> Then I ran thefollowing
> {code}accumulo org.apache.accumulo.server.test.TestIngest --table test --rows 65536 --cols 100 --size 8192 -z 172.16.101.220:2181 --batchMemory 100000000 --batchThreads 10 {code}
> Eventually the memory map filled, minor compaction happened, local datanode was killed and things died. Logs filled with-
> {code} org.apache.hadoop.ipc.RemoteException: java.io.IOException: File /accumulo/wal/172.16.101.219+9997/08b9f1b4-26d5-4b07-a260-3334c2013576 could only be replicated to 0 nodes, instead of 1
> at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1556)
> at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:696)
> at sun.reflect.GeneratedMethodAccessor13.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:616)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:563)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1388)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1384)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:416)
> at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1093)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1382)
> {code}
> and
> {code}
> Unexpected error writing to log, retrying attempt 1
> java.io.IOException: DFSOutputStream is closed
> at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.sync(DFSClient.java:3666)
> at org.apache.hadoop.fs.FSDataOutputStream.sync(FSDataOutputStream.java:97)
> at org.apache.accumulo.server.tabletserver.log.DfsLogger.defineTablet(DfsLogger.java:295)
> at org.apache.accumulo.server.tabletserver.log.TabletServerLogger$4.write(TabletServerLogger.java:333)
> at org.apache.accumulo.server.tabletserver.log.TabletServerLogger.write(TabletServerLogger.java:273)
> at org.apache.accumulo.server.tabletserver.log.TabletServerLogger.write(TabletServerLogger.java:229)
> at org.apache.accumulo.server.tabletserver.log.TabletServerLogger.defineTablet(TabletServerLogger.java:330)
> at org.apache.accumulo.server.tabletserver.log.TabletServerLogger.write(TabletServerLogger.java:254)
> at org.apache.accumulo.server.tabletserver.log.TabletServerLogger.write(TabletServerLogger.java:229)
> at org.apache.accumulo.server.tabletserver.log.TabletServerLogger.defineTablet(TabletServerLogger.java:330)
> ... repeats...
> {code}.
> Bringing the datanode back up did NOT fix it, either.
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