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https://issues.apache.org/jira/browse/HBASE-9667?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13782713#comment-13782713
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Nicolas Liochon commented on HBASE-9667:
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The issue is that the javadoc says for nullOutputStream : Since 14.0 (since 1.0
as com.google.common.io.NullOutputStream)
So we would have to upgrade to guava 14 and people will be able to use guava
15, but then people using version 11 will have to upgrade, upgrade their third
parties that depends on that old version.
For 0.94 it seems to be an issue. For 0.96 it is possible, if it doesn't mess
with hadoop common who uses guava as well.
Note that the issue may be less critical in 0.96: the code using
NullOutputStream is in hbase-server, not hbase client, so upgrading guava would
work.
The other option being to stop using both NullOutputStream and
nullOutputStream. This would work in 0.94 as well.
btw, [~mdgreenfield], what's the version of HBase you're using? I don't see
NullOutputStream referenced in HFileWriterV2 in 0.94 head.
> NullOutputStream removed from Guava 15
> --------------------------------------
>
> Key: HBASE-9667
> URL: https://issues.apache.org/jira/browse/HBASE-9667
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 0.98.0, 0.94.12, 0.96.1
> Reporter: Matt Greenfield
> Priority: Minor
>
> {{com.google.common.io.NullOutputStream}} was dropped in Guava 15.0 in favor
> of {{com.google.common.io.ByteStreams.nullOutputStream()}} which prevents
> projects on this artifact from upgrading from Guava 14 to Guava 15.
> {noformat}
> ERROR 2013-09-26 17:46:12,229 [hbase.master.MasterFileSystem] bootstrap
> org.apache.hadoop.hbase.DroppedSnapshotException: region: -ROOT-,,0
> at
> org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1608)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1482)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.doClose(HRegion.java:1011)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.close(HRegion.java:959)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.close(HRegion.java:930)
> at
> org.apache.hadoop.hbase.master.MasterFileSystem.bootstrap(MasterFileSystem.java:447)
> at
> org.apache.hadoop.hbase.master.MasterFileSystem.checkRootDir(MasterFileSystem.java:387)
> at
> org.apache.hadoop.hbase.master.MasterFileSystem.createInitialFileSystemLayout(MasterFileSystem.java:134)
> at
> org.apache.hadoop.hbase.master.MasterFileSystem.<init>(MasterFileSystem.java:119)
> at
> org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:536)
> at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:395)
> at java.lang.Thread.run(Thread.java:680)
> Caused by: java.lang.NoClassDefFoundError:
> com/google/common/io/NullOutputStream
> at
> org.apache.hadoop.hbase.io.hfile.HFileWriterV2.close(HFileWriterV2.java:374)
> at
> org.apache.hadoop.hbase.regionserver.StoreFile$Writer.close(StoreFile.java:1283)
> at
> org.apache.hadoop.hbase.regionserver.Store.internalFlushCache(Store.java:836)
> at
> org.apache.hadoop.hbase.regionserver.Store.flushCache(Store.java:747)
> at
> org.apache.hadoop.hbase.regionserver.Store$StoreFlusherImpl.flushCache(Store.java:2229)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1583)
> ... 11 more
> Caused by: java.lang.ClassNotFoundException:
> com.google.common.io.NullOutputStream
> at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
> ... 17 more
> {noformat}
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