See <https://builds.apache.org/job/Hadoop-Hdfs-trunk/3121/changes>
Changes: [vinodkv] YARN-4842. Fixed "yarn logs" command to guess (and thus not require) the ------------------------------------------ [...truncated 7126 lines...] Running org.apache.hadoop.hdfs.TestFileChecksum Tests run: 6, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 86.433 sec - in org.apache.hadoop.hdfs.TestDecommissionWithStriped Running org.apache.hadoop.hdfs.TestDFSStorageStateRecovery Tests run: 4, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 135.484 sec - in org.apache.hadoop.hdfs.TestDFSStripedOutputStreamWithFailure Running org.apache.hadoop.hdfs.TestGetFileChecksum Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 16.855 sec - in org.apache.hadoop.hdfs.TestGetFileChecksum Running org.apache.hadoop.hdfs.TestDFSStripedOutputStreamWithFailure180 Tests run: 6, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 353.665 sec - in org.apache.hadoop.hdfs.server.datanode.TestDirectoryScanner Running org.apache.hadoop.hdfs.TestFileConcurrentReader Tests run: 8, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 84.018 sec - in org.apache.hadoop.hdfs.TestFileChecksum Running org.apache.hadoop.hdfs.util.TestBestEffortLongFile Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.531 sec - in org.apache.hadoop.hdfs.util.TestBestEffortLongFile Running org.apache.hadoop.hdfs.util.TestStripedBlockUtil Tests run: 7, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 44.173 sec - in org.apache.hadoop.hdfs.TestFileConcurrentReader Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 7.849 sec - in org.apache.hadoop.hdfs.util.TestStripedBlockUtil Running org.apache.hadoop.hdfs.util.TestLightWeightLinkedSet Running org.apache.hadoop.hdfs.util.TestCombinedHostsFileReader Tests run: 17, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.075 sec - in org.apache.hadoop.hdfs.util.TestLightWeightLinkedSet Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.342 sec - in org.apache.hadoop.hdfs.util.TestCombinedHostsFileReader Running org.apache.hadoop.hdfs.util.TestMD5FileUtils Running org.apache.hadoop.hdfs.util.TestAtomicFileOutputStream Tests run: 5, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.201 sec - in org.apache.hadoop.hdfs.util.TestMD5FileUtils Running org.apache.hadoop.hdfs.util.TestXMLUtils Tests run: 4, Failures: 0, Errors: 0, Skipped: 1, Time elapsed: 1.177 sec - in org.apache.hadoop.hdfs.util.TestAtomicFileOutputStream Tests run: 6, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.321 sec - in org.apache.hadoop.hdfs.util.TestXMLUtils Running org.apache.hadoop.hdfs.util.TestCyclicIteration Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.351 sec - in org.apache.hadoop.hdfs.util.TestCyclicIteration Running org.apache.hadoop.hdfs.util.TestLightWeightHashSet Tests run: 14, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.581 sec - in org.apache.hadoop.hdfs.util.TestLightWeightHashSet Running org.apache.hadoop.hdfs.util.TestDiff Running org.apache.hadoop.hdfs.TestDFSStartupVersions Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 6.464 sec - in org.apache.hadoop.hdfs.util.TestDiff Running org.apache.hadoop.hdfs.TestWriteBlockGetsBlockLengthHint Tests run: 10, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 81.711 sec - in org.apache.hadoop.hdfs.TestDFSStripedOutputStreamWithFailure180 Running org.apache.hadoop.hdfs.TestReservedRawPaths Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 10.911 sec - in org.apache.hadoop.hdfs.TestWriteBlockGetsBlockLengthHint Running org.apache.hadoop.hdfs.TestRead Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 116.739 sec - in org.apache.hadoop.hdfs.TestDFSStorageStateRecovery Running org.apache.hadoop.hdfs.TestAppendDifferentChecksum Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 24.774 sec - in org.apache.hadoop.hdfs.TestDFSStartupVersions Running org.apache.hadoop.hdfs.TestDFSRollback Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 13.098 sec - in org.apache.hadoop.hdfs.TestRead Tests run: 8, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 20.041 sec - in org.apache.hadoop.hdfs.TestReservedRawPaths Running org.apache.hadoop.hdfs.TestMiniDFSCluster Running org.apache.hadoop.hdfs.TestClientReportBadBlock Tests run: 3, Failures: 0, Errors: 0, Skipped: 1, Time elapsed: 15.016 sec - in org.apache.hadoop.hdfs.TestAppendDifferentChecksum Running org.apache.hadoop.hdfs.TestFileStatusWithECPolicy Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 8.898 sec - in org.apache.hadoop.hdfs.TestFileStatusWithECPolicy Running org.apache.hadoop.hdfs.TestApplyingStoragePolicy Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 15.61 sec - in org.apache.hadoop.hdfs.TestClientReportBadBlock Running org.apache.hadoop.hdfs.TestReadStripedFileWithMissingBlocks Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 24.402 sec - in org.apache.hadoop.hdfs.TestDFSRollback Tests run: 7, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 18.011 sec - in org.apache.hadoop.hdfs.TestMiniDFSCluster Running org.apache.hadoop.hdfs.TestLeaseRecovery2 Running org.apache.hadoop.hdfs.protocol.TestLayoutVersion Tests run: 11, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.48 sec - in org.apache.hadoop.hdfs.protocol.TestLayoutVersion Running org.apache.hadoop.hdfs.protocol.datatransfer.TestPacketReceiver Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.923 sec - in org.apache.hadoop.hdfs.protocol.datatransfer.TestPacketReceiver Running org.apache.hadoop.hdfs.protocol.datatransfer.sasl.TestSaslDataTransfer Tests run: 4, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 14.113 sec - in org.apache.hadoop.hdfs.TestApplyingStoragePolicy Running org.apache.hadoop.hdfs.protocol.TestAnnotations Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.328 sec - in org.apache.hadoop.hdfs.protocol.TestAnnotations Running org.apache.hadoop.hdfs.protocol.TestLocatedBlock Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.536 sec - in org.apache.hadoop.hdfs.protocol.TestLocatedBlock Running org.apache.hadoop.hdfs.protocol.TestBlockListAsLongs Tests run: 7, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.858 sec - in org.apache.hadoop.hdfs.protocol.TestBlockListAsLongs Running org.apache.hadoop.hdfs.TestAbandonBlock Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 16.463 sec - in org.apache.hadoop.hdfs.TestAbandonBlock Running org.apache.hadoop.hdfs.TestDFSStripedOutputStreamWithFailure190 Tests run: 9, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 32.155 sec - in org.apache.hadoop.hdfs.protocol.datatransfer.sasl.TestSaslDataTransfer Running org.apache.hadoop.hdfs.crypto.TestHdfsCryptoStreams Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 61.422 sec - in org.apache.hadoop.hdfs.TestReadStripedFileWithMissingBlocks Running org.apache.hadoop.hdfs.TestFileAppendRestart Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 21.067 sec - in org.apache.hadoop.hdfs.TestFileAppendRestart Running org.apache.hadoop.hdfs.TestFetchImage Tests run: 14, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 48.151 sec - in org.apache.hadoop.hdfs.crypto.TestHdfsCryptoStreams Running org.apache.hadoop.hdfs.TestDFSStripedOutputStreamWithFailure200 Tests run: 10, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.615 sec - in org.apache.hadoop.hdfs.TestDFSStripedOutputStreamWithFailure200 Running org.apache.hadoop.hdfs.TestSafeModeWithStripedFile Tests run: 7, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 86.64 sec - in org.apache.hadoop.hdfs.TestLeaseRecovery2 Running org.apache.hadoop.hdfs.TestDFSStripedOutputStreamWithFailure170 Tests run: 10, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.704 sec - in org.apache.hadoop.hdfs.TestDFSStripedOutputStreamWithFailure170 Running org.apache.hadoop.hdfs.TestDFSStripedOutputStreamWithFailure010 Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 8.314 sec - in org.apache.hadoop.hdfs.TestFetchImage Running org.apache.hadoop.hdfs.TestFileCreationDelete Tests run: 10, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 68.883 sec - in org.apache.hadoop.hdfs.TestDFSStripedOutputStreamWithFailure190 Running org.apache.hadoop.hdfs.TestCrcCorruption Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 21.129 sec - in org.apache.hadoop.hdfs.TestFileCreationDelete Running org.apache.hadoop.hdfs.TestHDFSFileSystemContract Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 38.205 sec - in org.apache.hadoop.hdfs.TestSafeModeWithStripedFile Running org.apache.hadoop.hdfs.TestBlockStoragePolicy Tests run: 4, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 31.514 sec - in org.apache.hadoop.hdfs.TestCrcCorruption Running org.apache.hadoop.hdfs.TestDatanodeDeath Tests run: 10, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 86.173 sec - in org.apache.hadoop.hdfs.TestDFSStripedOutputStreamWithFailure010 Running org.apache.hadoop.hdfs.TestParallelReadUtil Tests run: 1, Failures: 0, Errors: 0, Skipped: 1, Time elapsed: 0.064 sec - in org.apache.hadoop.hdfs.TestParallelReadUtil Tests run: 20, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 51.144 sec - in org.apache.hadoop.hdfs.TestBlockStoragePolicy Running org.apache.hadoop.hdfs.TestDFSUpgrade Running org.apache.hadoop.hdfs.TestDFSShell Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 22.834 sec - in org.apache.hadoop.hdfs.TestDFSUpgrade Running org.apache.hadoop.hdfs.TestFileAppend2 Tests run: 4, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 71.794 sec - in org.apache.hadoop.hdfs.TestDatanodeDeath Running org.apache.hadoop.hdfs.TestKeyProviderCache Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.167 sec - in org.apache.hadoop.hdfs.TestKeyProviderCache Running org.apache.hadoop.hdfs.TestListFilesInDFS Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 9.882 sec - in org.apache.hadoop.hdfs.TestListFilesInDFS Running org.apache.hadoop.hdfs.TestDFSStripedOutputStreamWithFailure160 Tests run: 44, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 113.581 sec - in org.apache.hadoop.hdfs.TestHDFSFileSystemContract Running org.apache.hadoop.hdfs.TestAppendSnapshotTruncate Tests run: 43, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 61.642 sec - in org.apache.hadoop.hdfs.TestDFSShell Running org.apache.hadoop.hdfs.TestDFSStripedOutputStreamWithFailure150 Tests run: 10, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.836 sec - in org.apache.hadoop.hdfs.TestDFSStripedOutputStreamWithFailure150 Running org.apache.hadoop.hdfs.TestDFSOutputStream Tests run: 5, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 48.912 sec - in org.apache.hadoop.hdfs.TestFileAppend2 Running org.apache.hadoop.hdfs.TestHDFSServerPorts Tests run: 4, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 15.943 sec - in org.apache.hadoop.hdfs.TestDFSOutputStream Running org.apache.hadoop.hdfs.TestDFSStripedOutputStreamWithFailure060 Tests run: 4, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 12.837 sec - in org.apache.hadoop.hdfs.TestHDFSServerPorts Running org.apache.hadoop.hdfs.TestDFSClientExcludedNodes Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 35.848 sec - in org.apache.hadoop.hdfs.TestAppendSnapshotTruncate Running org.apache.hadoop.hdfs.TestDFSPermission Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 19.435 sec - in org.apache.hadoop.hdfs.TestDFSClientExcludedNodes Running org.apache.hadoop.hdfs.TestRestartDFS Tests run: 8, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 42.603 sec - in org.apache.hadoop.hdfs.TestDFSPermission Running org.apache.hadoop.cli.TestCryptoAdminCLI Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 27.124 sec - in org.apache.hadoop.hdfs.TestRestartDFS Running org.apache.hadoop.cli.TestHDFSCLI Tests run: 10, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 60.411 sec - in org.apache.hadoop.hdfs.TestDFSStripedOutputStreamWithFailure060 Running org.apache.hadoop.cli.TestAclCLI Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 13.991 sec - in org.apache.hadoop.cli.TestCryptoAdminCLI Running org.apache.hadoop.cli.TestDeleteCLI Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 10.935 sec - in org.apache.hadoop.cli.TestAclCLI Running org.apache.hadoop.cli.TestCacheAdminCLI Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 12.763 sec - in org.apache.hadoop.cli.TestDeleteCLI Running org.apache.hadoop.cli.TestErasureCodingCLI Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 11.621 sec - in org.apache.hadoop.cli.TestCacheAdminCLI Running org.apache.hadoop.cli.TestXAttrCLI Tests run: 10, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 125.213 sec - in org.apache.hadoop.hdfs.TestDFSStripedOutputStreamWithFailure160 Running org.apache.hadoop.TestRefreshCallQueue Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 12.358 sec - in org.apache.hadoop.cli.TestErasureCodingCLI Running org.apache.hadoop.security.TestPermissionSymlinks Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 8.52 sec - in org.apache.hadoop.TestRefreshCallQueue Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 11.637 sec - in org.apache.hadoop.cli.TestXAttrCLI Running org.apache.hadoop.security.TestPermission Running org.apache.hadoop.security.TestRefreshUserMappings Tests run: 15, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 10.918 sec - in org.apache.hadoop.security.TestPermissionSymlinks Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 10.979 sec - in org.apache.hadoop.security.TestPermission Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 10.304 sec - in org.apache.hadoop.security.TestRefreshUserMappings Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 80.298 sec - in org.apache.hadoop.cli.TestHDFSCLI Results : Failed tests: TestEditLog.testBatchedSyncWithClosedLogs:594 logging edit without syncing should do not affect txid expected:<1> but was:<2> Tests in error: TestRollingFileSystemSinkWithSecureHdfs.testMissingPropertiesWithSecureHDFS:146->createDirectoriesSecurely:192 » IO TestAsyncDFSRename.testAggressiveConcurrentAsyncRenameWithOverwrite:184->internalTestConcurrentAsyncRenameWithOverwrite:221->Object.wait:-2 » TestAsyncDFSRename.testCallGetReturnValueMultipleTimes:124 » IO Cannot remove ... TestAsyncDFSRename.testConservativeConcurrentAsyncRenameWithOverwrite:191->internalTestConcurrentAsyncRenameWithOverwrite:220 » TestAsyncDFSRename.testAsyncRenameWithOverwrite:101 » EditLogInput Error repla... TestSecureNNWithQJM.testSecureMode:167->doNNWithQJMTest:193->restartNameNode:205 » EditLogInput Tests run: 4415, Failures: 1, Errors: 6, Skipped: 17 [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Skipping Apache Hadoop HDFS Native Client [INFO] This project has been banned from the build due to previous failures. [INFO] ------------------------------------------------------------------------ [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Skipping Apache Hadoop HttpFS [INFO] This project has been banned from the build due to previous failures. [INFO] ------------------------------------------------------------------------ [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Skipping Apache Hadoop HDFS BookKeeper Journal [INFO] This project has been banned from the build due to previous failures. [INFO] ------------------------------------------------------------------------ [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Skipping Apache Hadoop HDFS-NFS [INFO] This project has been banned from the build due to previous failures. [INFO] ------------------------------------------------------------------------ [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Building Apache Hadoop HDFS Project 3.0.0-SNAPSHOT [INFO] ------------------------------------------------------------------------ [INFO] [INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ hadoop-hdfs-project --- [INFO] Deleting <https://builds.apache.org/job/Hadoop-Hdfs-trunk/ws/hadoop-hdfs-project/target> [INFO] [INFO] --- maven-antrun-plugin:1.7:run (create-testdirs) @ hadoop-hdfs-project --- [INFO] Executing tasks main: [mkdir] Created dir: <https://builds.apache.org/job/Hadoop-Hdfs-trunk/ws/hadoop-hdfs-project/target/test-dir> [INFO] Executed tasks [INFO] [INFO] --- maven-source-plugin:2.3:jar-no-fork (hadoop-java-sources) @ hadoop-hdfs-project --- [INFO] [INFO] --- maven-source-plugin:2.3:test-jar-no-fork (hadoop-java-sources) @ hadoop-hdfs-project --- [INFO] [INFO] --- maven-enforcer-plugin:1.3.1:enforce (dist-enforce) @ hadoop-hdfs-project --- [INFO] [INFO] --- maven-site-plugin:3.5:attach-descriptor (attach-descriptor) @ hadoop-hdfs-project --- [INFO] [INFO] --- maven-javadoc-plugin:2.8.1:jar (module-javadocs) @ hadoop-hdfs-project --- [INFO] Skipping javadoc generation [INFO] [INFO] --- maven-enforcer-plugin:1.3.1:enforce (depcheck) @ hadoop-hdfs-project --- [INFO] [INFO] --- maven-checkstyle-plugin:2.15:checkstyle (default-cli) @ hadoop-hdfs-project --- [INFO] [INFO] --- findbugs-maven-plugin:3.0.0:findbugs (default-cli) @ hadoop-hdfs-project --- [INFO] ------------------------------------------------------------------------ [INFO] Reactor Summary: [INFO] [INFO] Apache Hadoop HDFS Client ......................... SUCCESS [05:47 min] [INFO] Apache Hadoop HDFS ................................ FAILURE [ 01:17 h] [INFO] Apache Hadoop HDFS Native Client .................. SKIPPED [INFO] Apache Hadoop HttpFS .............................. SKIPPED [INFO] Apache Hadoop HDFS BookKeeper Journal ............. SKIPPED [INFO] Apache Hadoop HDFS-NFS ............................ SKIPPED [INFO] Apache Hadoop HDFS Project ........................ SUCCESS [ 0.134 s] [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 01:23 h [INFO] Finished at: 2016-05-10T10:33:29+00:00 [INFO] Final Memory: 59M/899M [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.17:test (default-test) on project hadoop-hdfs: There are test failures. [ERROR] [ERROR] Please refer to <https://builds.apache.org/job/Hadoop-Hdfs-trunk/ws/hadoop-hdfs-project/hadoop-hdfs/target/surefire-reports> for the individual test results. [ERROR] -> [Help 1] [ERROR] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. [ERROR] Re-run Maven using the -X switch to enable full debug logging. [ERROR] [ERROR] For more information about the errors and possible solutions, please read the following articles: [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException [ERROR] [ERROR] After correcting the problems, you can resume the build with the command [ERROR] mvn <goals> -rf :hadoop-hdfs Build step 'Execute shell' marked build as failure Archiving artifacts Recording test results --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-dev-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-dev-h...@hadoop.apache.org
