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https://issues.apache.org/jira/browse/HADOOP-16282?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16831925#comment-16831925
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Hudson commented on HADOOP-16282:
---------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #16496 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/16496/])
HADOOP-16282. Avoid FileStream to improve performance. Contributed by (gifuma:
rev 7a3188d054481b9bd563e337901e93476303ce7f)
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/offlineImageViewer/TextWriterImageVisitor.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/offlineEditsViewer/OfflineEditsVisitorFactory.java
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hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/crypto/random/OsSecureRandom.java
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hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/KDiag.java
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hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/RegexCopyFilter.java
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hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/HostsFileReader.java
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hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/qjournal/server/Journal.java
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hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/diskbalancer/command/Command.java
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hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/ConfTest.java
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hadoop-hdfs-project/hadoop-hdfs-httpfs/src/main/java/org/apache/hadoop/fs/http/server/HttpFSAuthenticationFilter.java
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hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/util/MD5FileUtils.java
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hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/shell/CopyCommands.java
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hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/conf/Configuration.java
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hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/aliasmap/InMemoryAliasMap.java
* (edit)
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/LdapGroupsMapping.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/util/CombinedHostsFileReader.java
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hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/RunJar.java
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hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/net/TableMapping.java
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hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/hash/JenkinsHash.java
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hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/offlineImageViewer/OfflineImageReconstructor.java
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hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetUtil.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DebugAdmin.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs-httpfs/src/main/java/org/apache/hadoop/lib/server/Server.java
* (edit)
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/SysInfoLinux.java
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hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics2/sink/FileSink.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/util/CombinedHostsFileWriter.java
* (edit)
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/ssl/ReloadingX509TrustManager.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/offlineImageViewer/OfflineImageViewer.java
* (edit)
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileUtil.java
* (edit)
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/util/TestHostsFileReader.java
* (edit)
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/Credentials.java
* (edit)
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/alias/LocalJavaKeyStoreProvider.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImagePreTransactionalStorageInspector.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/BlockPoolSlice.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImageFormat.java
* (edit)
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/ssl/FileBasedKeyStoresFactory.java
* (edit)
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/ShellBasedIdMapping.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/EditLogFileInputStream.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java
* (edit)
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/FileBasedIPList.java
* (edit)
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/JsonSerialization.java
> Avoid FileStream to improve performance
> ---------------------------------------
>
> Key: HADOOP-16282
> URL: https://issues.apache.org/jira/browse/HADOOP-16282
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Ayush Saxena
> Assignee: Ayush Saxena
> Priority: Major
> Fix For: 3.3.0
>
> Attachments: HADOOP-16282-01.patch, HADOOP-16282-02.patch
>
>
> The FileInputStream and FileOutputStream classes contains a finalizer method
> which will cause garbage collection pauses. See
> [JDK-8080225|https://bugs.openjdk.java.net/browse/JDK-8080225] for details.
> The FileReader and FileWriter constructors instantiate FileInputStream and
> FileOutputStream, again causing garbage collection issues while finalizer
> methods are called.
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