Constant Field Values


Contents
org.apache.*

org.apache.hadoop.hdfs.DFSClient
public static final int MAX_BLOCK_ACQUIRE_FAILURES 3
public static final long SERVER_DEFAULTS_VALIDITY_PERIOD 3600000L

org.apache.hadoop.hdfs.DFSConfigKeys
public static final int DFS_BALANCER_MOVEDWINWIDTH_DEFAULT 5400000
public static final String DFS_BALANCER_MOVEDWINWIDTH_KEY "dfs.balancer.movedWinWidth"
public static final long DFS_BLOCK_ACCESS_KEY_UPDATE_INTERVAL_DEFAULT 600L
public static final String DFS_BLOCK_ACCESS_KEY_UPDATE_INTERVAL_KEY "dfs.block.access.key.update.interval"
public static final boolean DFS_BLOCK_ACCESS_TOKEN_ENABLE_DEFAULT false
public static final String DFS_BLOCK_ACCESS_TOKEN_ENABLE_KEY "dfs.block.access.token.enable"
public static final long DFS_BLOCK_ACCESS_TOKEN_LIFETIME_DEFAULT 600L
public static final String DFS_BLOCK_ACCESS_TOKEN_LIFETIME_KEY "dfs.block.access.token.lifetime"
public static final long DFS_BLOCK_SIZE_DEFAULT 67108864L
public static final String DFS_BLOCK_SIZE_KEY "dfs.blocksize"
public static final int DFS_BLOCKREPORT_INITIAL_DELAY_DEFAULT 0
public static final String DFS_BLOCKREPORT_INITIAL_DELAY_KEY "dfs.blockreport.initialDelay"
public static final long DFS_BLOCKREPORT_INTERVAL_MSEC_DEFAULT 21600000L
public static final String DFS_BLOCKREPORT_INTERVAL_MSEC_KEY "dfs.blockreport.intervalMsec"
public static final int DFS_BYTES_PER_CHECKSUM_DEFAULT 512
public static final String DFS_BYTES_PER_CHECKSUM_KEY "dfs.bytes-per-checksum"
public static final int DFS_CLIENT_BLOCK_WRITE_LOCATEFOLLOWINGBLOCK_RETRIES_DEFAULT 5
public static final String DFS_CLIENT_BLOCK_WRITE_LOCATEFOLLOWINGBLOCK_RETRIES_KEY "dfs.client.block.write.locateFollowingBlock.retries"
public static final int DFS_CLIENT_BLOCK_WRITE_RETRIES_DEFAULT 3
public static final String DFS_CLIENT_BLOCK_WRITE_RETRIES_KEY "dfs.client.block.write.retries"
public static final String DFS_CLIENT_HTTPS_KEYSTORE_RESOURCE_DEFAULT "ssl-client.xml"
public static final String DFS_CLIENT_HTTPS_KEYSTORE_RESOURCE_KEY "dfs.client.https.keystore.resource"
public static final boolean DFS_CLIENT_HTTPS_NEED_AUTH_DEFAULT false
public static final String DFS_CLIENT_HTTPS_NEED_AUTH_KEY "dfs.client.https.need-auth"
public static final int DFS_CLIENT_MAX_BLOCK_ACQUIRE_FAILURES_DEFAULT 3
public static final String DFS_CLIENT_MAX_BLOCK_ACQUIRE_FAILURES_KEY "dfs.client.max.block.acquire.failures"
public static final String DFS_CLIENT_READ_PREFETCH_SIZE_KEY "dfs.client.read.prefetch.size"
public static final String DFS_CLIENT_RETRY_WINDOW_BASE "dfs.client.retry.window.base"
public static final String DFS_CLIENT_SOCKET_TIMEOUT_KEY "dfs.client.socket-timeout"
public static final int DFS_CLIENT_WRITE_PACKET_SIZE_DEFAULT 65536
public static final String DFS_CLIENT_WRITE_PACKET_SIZE_KEY "dfs.client-write-packet-size"
public static final String DFS_DATANODE_ADDRESS_DEFAULT "0.0.0.0:50010"
public static final String DFS_DATANODE_ADDRESS_KEY "dfs.datanode.address"
public static final long DFS_DATANODE_BALANCE_BANDWIDTHPERSEC_DEFAULT 1048576L
public static final String DFS_DATANODE_BALANCE_BANDWIDTHPERSEC_KEY "dfs.datanode.balance.bandwidthPerSec"
public static final String DFS_DATANODE_DATA_DIR_KEY "dfs.datanode.data.dir"
public static final String DFS_DATANODE_DATA_DIR_PERMISSION_DEFAULT "755"
public static final String DFS_DATANODE_DATA_DIR_PERMISSION_KEY "dfs.datanode.data.dir.perm"
public static final int DFS_DATANODE_DIRECTORYSCAN_INTERVAL_DEFAULT 21600
public static final String DFS_DATANODE_DIRECTORYSCAN_INTERVAL_KEY "dfs.datanode.directoryscan.interval"
public static final int DFS_DATANODE_DIRECTORYSCAN_THREADS_DEFAULT 1
public static final String DFS_DATANODE_DIRECTORYSCAN_THREADS_KEY "dfs.datanode.directoryscan.threads"
public static final String DFS_DATANODE_DNS_INTERFACE_DEFAULT "default"
public static final String DFS_DATANODE_DNS_INTERFACE_KEY "dfs.datanode.dns.interface"
public static final String DFS_DATANODE_DNS_NAMESERVER_DEFAULT "default"
public static final String DFS_DATANODE_DNS_NAMESERVER_KEY "dfs.datanode.dns.nameserver"
public static final long DFS_DATANODE_DU_RESERVED_DEFAULT 0L
public static final String DFS_DATANODE_DU_RESERVED_KEY "dfs.datanode.du.reserved"
public static final int DFS_DATANODE_FAILED_VOLUMES_TOLERATED_DEFAULT 0
public static final String DFS_DATANODE_FAILED_VOLUMES_TOLERATED_KEY "dfs.datanode.failed.volumes.tolerated"
public static final int DFS_DATANODE_HANDLER_COUNT_DEFAULT 3
public static final String DFS_DATANODE_HANDLER_COUNT_KEY "dfs.datanode.handler.count"
public static final String DFS_DATANODE_HOST_NAME_KEY "dfs.datanode.hostname"
public static final String DFS_DATANODE_HTTP_ADDRESS_DEFAULT "0.0.0.0:50075"
public static final String DFS_DATANODE_HTTP_ADDRESS_KEY "dfs.datanode.http.address"
public static final String DFS_DATANODE_HTTPS_ADDRESS_DEFAULT "0.0.0.0:50475"
public static final String DFS_DATANODE_HTTPS_ADDRESS_KEY "dfs.datanode.https.address"
public static final String DFS_DATANODE_IPC_ADDRESS_DEFAULT "0.0.0.0:50020"
public static final String DFS_DATANODE_IPC_ADDRESS_KEY "dfs.datanode.ipc.address"
public static final String DFS_DATANODE_KEYTAB_FILE_KEY "dfs.datanode.keytab.file"
public static final int DFS_DATANODE_MAX_XCIEVERS_DEFAULT 256
public static final String DFS_DATANODE_MAX_XCIEVERS_KEY "dfs.datanode.max.xcievers"
public static final int DFS_DATANODE_NUMBLOCKS_DEFAULT 64
public static final String DFS_DATANODE_NUMBLOCKS_KEY "dfs.datanode.numblocks"
public static final String DFS_DATANODE_PLUGINS_KEY "dfs.datanode.plugins"
public static final int DFS_DATANODE_SCAN_PERIOD_HOURS_DEFAULT 0
public static final String DFS_DATANODE_SCAN_PERIOD_HOURS_KEY "dfs.datanode.scan.period.hours"
public static final long DFS_DATANODE_SIMULATEDDATASTORAGE_CAPACITY_DEFAULT 2199023255552L
public static final String DFS_DATANODE_SIMULATEDDATASTORAGE_CAPACITY_KEY "dfs.datanode.simulateddatastorage.capacity"
public static final boolean DFS_DATANODE_SIMULATEDDATASTORAGE_DEFAULT false
public static final String DFS_DATANODE_SIMULATEDDATASTORAGE_KEY "dfs.datanode.simulateddatastorage"
public static final String DFS_DATANODE_SOCKET_WRITE_TIMEOUT_KEY "dfs.datanode.socket.write.timeout"
public static final String DFS_DATANODE_STARTUP_KEY "dfs.datanode.startup"
public static final String DFS_DATANODE_STORAGEID_KEY "dfs.datanode.StorageId"
public static final boolean DFS_DATANODE_TRANSFERTO_ALLOWED_DEFAULT true
public static final String DFS_DATANODE_TRANSFERTO_ALLOWED_KEY "dfs.datanode.transferTo.allowed"
public static final String DFS_DATANODE_USER_NAME_KEY "dfs.datanode.user.name.key"
public static final int DFS_DEFAULT_CHUNK_VIEW_SIZE_DEFAULT 32768
public static final String DFS_DEFAULT_CHUNK_VIEW_SIZE_KEY "dfs.default.chunk.view.size"
public static final int DFS_DF_INTERVAL_DEFAULT 60000
public static final String DFS_DF_INTERVAL_KEY "dfs.df.interval"
public static final long DFS_HEARTBEAT_INTERVAL_DEFAULT 3L
public static final String DFS_HEARTBEAT_INTERVAL_KEY "dfs.heartbeat.interval"
public static final boolean DFS_HTTPS_ENABLE_DEFAULT false
public static final String DFS_HTTPS_ENABLE_KEY "dfs.https.enable"
public static final String DFS_LIST_LIMIT "dfs.ls.limit"
public static final int DFS_LIST_LIMIT_DEFAULT 1000
public static final String DFS_METRICS_SESSION_ID_KEY "dfs.metrics.session-id"
public static final long DFS_NAMENODE_ACCESSTIME_PRECISION_DEFAULT 3600000L
public static final String DFS_NAMENODE_ACCESSTIME_PRECISION_KEY "dfs.namenode.accesstime.precision"
public static final String DFS_NAMENODE_BACKUP_ADDRESS_DEFAULT "localhost:50100"
public static final String DFS_NAMENODE_BACKUP_ADDRESS_KEY "dfs.namenode.backup.address"
public static final String DFS_NAMENODE_BACKUP_HTTP_ADDRESS_DEFAULT "0.0.0.0:50105"
public static final String DFS_NAMENODE_BACKUP_HTTP_ADDRESS_KEY "dfs.namenode.backup.http-address"
public static final String DFS_NAMENODE_CHECKPOINT_DIR_KEY "dfs.namenode.checkpoint.dir"
public static final String DFS_NAMENODE_CHECKPOINT_EDITS_DIR_KEY "dfs.namenode.checkpoint.edits.dir"
public static final long DFS_NAMENODE_CHECKPOINT_PERIOD_DEFAULT 3600L
public static final String DFS_NAMENODE_CHECKPOINT_PERIOD_KEY "dfs.namenode.checkpoint.period"
public static final long DFS_NAMENODE_CHECKPOINT_SIZE_DEFAULT 4194304L
public static final String DFS_NAMENODE_CHECKPOINT_SIZE_KEY "dfs.namenode.checkpoint.size"
public static final int DFS_NAMENODE_DECOMMISSION_INTERVAL_DEFAULT 30
public static final String DFS_NAMENODE_DECOMMISSION_INTERVAL_KEY "dfs.namenode.decommission.interval"
public static final int DFS_NAMENODE_DECOMMISSION_NODES_PER_INTERVAL_DEFAULT 5
public static final String DFS_NAMENODE_DECOMMISSION_NODES_PER_INTERVAL_KEY "dfs.namenode.decommission.nodes.per.interval"
public static final long DFS_NAMENODE_DELEGATION_KEY_UPDATE_INTERVAL_DEFAULT 86400000L
public static final String DFS_NAMENODE_DELEGATION_KEY_UPDATE_INTERVAL_KEY "dfs.namenode.delegation.key.update-interval"
public static final long DFS_NAMENODE_DELEGATION_TOKEN_MAX_LIFETIME_DEFAULT 604800000L
public static final String DFS_NAMENODE_DELEGATION_TOKEN_MAX_LIFETIME_KEY "dfs.namenode.delegation.token.max-lifetime"
public static final long DFS_NAMENODE_DELEGATION_TOKEN_RENEW_INTERVAL_DEFAULT 86400000L
public static final String DFS_NAMENODE_DELEGATION_TOKEN_RENEW_INTERVAL_KEY "dfs.namenode.delegation.token.renew-interval"
public static final String DFS_NAMENODE_EDITS_DIR_KEY "dfs.namenode.edits.dir"
public static final int DFS_NAMENODE_HANDLER_COUNT_DEFAULT 10
public static final String DFS_NAMENODE_HANDLER_COUNT_KEY "dfs.namenode.handler.count"
public static final int DFS_NAMENODE_HEARTBEAT_RECHECK_INTERVAL_DEFAULT 300000
public static final String DFS_NAMENODE_HEARTBEAT_RECHECK_INTERVAL_KEY "dfs.namenode.heartbeat.recheck-interval"
public static final String DFS_NAMENODE_HOSTS_EXCLUDE_KEY "dfs.namenode.hosts.exclude"
public static final String DFS_NAMENODE_HOSTS_KEY "dfs.namenode.hosts"
public static final String DFS_NAMENODE_HTTP_ADDRESS_DEFAULT "0.0.0.0:50070"
public static final String DFS_NAMENODE_HTTP_ADDRESS_KEY "dfs.namenode.http-address"
public static final String DFS_NAMENODE_HTTPS_ADDRESS_DEFAULT "0.0.0.0:50470"
public static final String DFS_NAMENODE_HTTPS_ADDRESS_KEY "dfs.namenode.https-address"
public static final String DFS_NAMENODE_KEYTAB_FILE_KEY "dfs.namenode.keytab.file"
public static final long DFS_NAMENODE_MAX_OBJECTS_DEFAULT 0L
public static final String DFS_NAMENODE_MAX_OBJECTS_KEY "dfs.namenode.max.objects"
public static final String DFS_NAMENODE_NAME_DIR_KEY "dfs.namenode.name.dir"
public static final boolean DFS_NAMENODE_NAME_DIR_RESTORE_DEFAULT false
public static final String DFS_NAMENODE_NAME_DIR_RESTORE_KEY "dfs.namenode.name.dir.restore"
public static final String DFS_NAMENODE_PLUGINS_KEY "dfs.namenode.plugins"
public static final boolean DFS_NAMENODE_REPLICATION_CONSIDERLOAD_DEFAULT true
public static final String DFS_NAMENODE_REPLICATION_CONSIDERLOAD_KEY "dfs.namenode.replication.considerLoad"
public static final int DFS_NAMENODE_REPLICATION_INTERVAL_DEFAULT 3
public static final String DFS_NAMENODE_REPLICATION_INTERVAL_KEY "dfs.namenode.replication.interval"
public static final int DFS_NAMENODE_REPLICATION_MAX_STREAMS_DEFAULT 2
public static final String DFS_NAMENODE_REPLICATION_MAX_STREAMS_KEY "dfs.namenode.replication.max-streams"
public static final int DFS_NAMENODE_REPLICATION_MIN_DEFAULT 1
public static final String DFS_NAMENODE_REPLICATION_MIN_KEY "dfs.namenode.replication.min"
public static final int DFS_NAMENODE_REPLICATION_PENDING_TIMEOUT_SEC_DEFAULT -1
public static final String DFS_NAMENODE_REPLICATION_PENDING_TIMEOUT_SEC_KEY "dfs.namenode.replication.pending.timeout-sec"
public static final int DFS_NAMENODE_SAFEMODE_EXTENSION_DEFAULT 30000
public static final String DFS_NAMENODE_SAFEMODE_EXTENSION_KEY "dfs.namenode.safemode.extension"
public static final float DFS_NAMENODE_SAFEMODE_THRESHOLD_PCT_DEFAULT 0.9990000128746033f
public static final String DFS_NAMENODE_SAFEMODE_THRESHOLD_PCT_KEY "dfs.namenode.safemode.threshold-pct"
public static final String DFS_NAMENODE_SECONDARY_HTTP_ADDRESS_DEFAULT "0.0.0.0:50090"
public static final String DFS_NAMENODE_SECONDARY_HTTP_ADDRESS_KEY "dfs.namenode.secondary.http-address"
public static final String DFS_NAMENODE_STARTUP_KEY "dfs.namenode.startup"
public static final int DFS_NAMENODE_UPGRADE_PERMISSION_DEFAULT 511
public static final String DFS_NAMENODE_UPGRADE_PERMISSION_KEY "dfs.namenode.upgrade.permission"
public static final String DFS_NAMENODE_USER_NAME_KEY "dfs.namenode.user.name.key"
public static final boolean DFS_PERMISSIONS_ENABLED_DEFAULT true
public static final String DFS_PERMISSIONS_ENABLED_KEY "dfs.permissions.enabled"
public static final String DFS_PERMISSIONS_SUPERUSERGROUP_DEFAULT "supergroup"
public static final String DFS_PERMISSIONS_SUPERUSERGROUP_KEY "dfs.permissions.superusergroup"
public static final short DFS_REPLICATION_DEFAULT 3
public static final String DFS_REPLICATION_KEY "dfs.replication"
public static final int DFS_REPLICATION_MAX_DEFAULT 512
public static final String DFS_REPLICATION_MAX_KEY "dfs.replication.max"
public static final String DFS_SERVER_HTTPS_KEYSTORE_RESOURCE_DEFAULT "ssl-server.xml"
public static final String DFS_SERVER_HTTPS_KEYSTORE_RESOURCE_KEY "dfs.https.server.keystore.resource"
public static final int DFS_STREAM_BUFFER_SIZE_DEFAULT 4096
public static final String DFS_STREAM_BUFFER_SIZE_KEY "dfs.stream-buffer-size"
public static final boolean DFS_SUPPORT_APPEND_DEFAULT true
public static final String DFS_SUPPORT_APPEND_KEY "dfs.support.append"
public static final String DFS_WEB_UGI_KEY "dfs.web.ugi"

org.apache.hadoop.hdfs.HftpFileSystem
public static final String HFTP_DATE_FORMAT "yyyy-MM-dd\'T\'HH:mm:ssZ"
public static final String HFTP_TIMEZONE "UTC"

org.apache.hadoop.hdfs.protocol.Block
public static final String BLOCK_FILE_PREFIX "blk_"
public static final String METADATA_EXTENSION ".meta"

org.apache.hadoop.hdfs.protocol.ClientDatanodeProtocol
public static final long versionID 6L

org.apache.hadoop.hdfs.protocol.ClientProtocol
public static final int GET_STATS_CAPACITY_IDX 0
public static final int GET_STATS_CORRUPT_BLOCKS_IDX 4
public static final int GET_STATS_MISSING_BLOCKS_IDX 5
public static final int GET_STATS_REMAINING_IDX 2
public static final int GET_STATS_UNDER_REPLICATED_IDX 3
public static final int GET_STATS_USED_IDX 1
public static final long versionID 60L

org.apache.hadoop.hdfs.protocol.DataTransferProtocol
public static final int DATA_TRANSFER_VERSION 19

org.apache.hadoop.hdfs.protocol.DataTransferProtocol.PipelineAck
public static final long UNKOWN_SEQNO -2L

org.apache.hadoop.hdfs.protocol.DSQuotaExceededException
protected static final long serialVersionUID 1L

org.apache.hadoop.hdfs.protocol.FSConstants
public static final int BLOCK_INVALIDATE_CHUNK 1000
public static final long BLOCKREPORT_INITIAL_DELAY 0L
public static final long BLOCKREPORT_INTERVAL 3600000L
public static final long DEFAULT_BLOCK_SIZE 67108864L
public static final int DEFAULT_BYTES_PER_CHECKSUM 512
public static final int DEFAULT_DATA_SOCKET_SIZE 131072
public static final int DEFAULT_FILE_BUFFER_SIZE 4096
public static final short DEFAULT_REPLICATION_FACTOR 3
public static final int DEFAULT_WRITE_PACKET_SIZE 65536
public static final String HDFS_URI_SCHEME "hdfs"
public static final long HEARTBEAT_INTERVAL 3L
public static final int LAYOUT_VERSION -24
public static final long LEASE_HARDLIMIT_PERIOD 3600000L
public static final long LEASE_RECOVER_PERIOD 10000L
public static final long LEASE_SOFTLIMIT_PERIOD 60000L
public static final int MAX_PATH_DEPTH 1000
public static final int MAX_PATH_LENGTH 8000
public static final int MIN_BLOCKS_FOR_WRITE 5
public static final long QUOTA_DONT_SET 9223372036854775807L
public static final long QUOTA_RESET -1L
public static final int SIZE_OF_INTEGER 4

org.apache.hadoop.hdfs.protocol.NSQuotaExceededException
protected static final long serialVersionUID 1L

org.apache.hadoop.hdfs.protocol.QuotaExceededException
protected static final long serialVersionUID 1L

org.apache.hadoop.hdfs.server.balancer.Balancer
public static final int ALREADY_RUNNING -1
public static final int ILLEGAL_ARGS -5
public static final int IO_EXCEPTION -4
public static final int MAX_NUM_CONCURRENT_MOVES 5
public static final int NO_MOVE_BLOCK -2
public static final int NO_MOVE_PROGRESS -3
public static final int SUCCESS 1

org.apache.hadoop.hdfs.server.common.GenerationStamp
public static final long FIRST_VALID_STAMP 1000L
public static final long GRANDFATHER_GENERATION_STAMP 0L

org.apache.hadoop.hdfs.server.common.HdfsConstants
public static final int READ_TIMEOUT 60000
public static final int READ_TIMEOUT_EXTENSION 5000
public static final int WRITE_TIMEOUT 480000
public static final int WRITE_TIMEOUT_EXTENSION 5000

org.apache.hadoop.hdfs.server.common.JspHelper
public static final String DELEGATION_PARAMETER_NAME "delegation"
public static final String SET_DELEGATION "&delegation="
public static final String WEB_UGI_PROPERTY_NAME "dfs.web.ugi"

org.apache.hadoop.hdfs.server.common.Storage
protected static final int LAST_PRE_UPGRADE_LAYOUT_VERSION -3
protected static final String LAST_UPGRADABLE_HADOOP_VERSION "Hadoop-0.14"
public static final int LAST_UPGRADABLE_LAYOUT_VERSION -7
public static final int PRE_GENERATIONSTAMP_LAYOUT_VERSION -13
public static final int PRE_RBW_LAYOUT_VERSION -19
public static final String STORAGE_DIR_CURRENT "current"
protected static final String STORAGE_FILE_VERSION "VERSION"

org.apache.hadoop.hdfs.server.datanode.DataNode
public static final String DN_CLIENTTRACE_FORMAT "src: %s, dest: %s, bytes: %s, op: %s, cliID: %s, offset: %s, srvID: %s, blockid: %s, duration: %s"
public static final String EMPTY_DEL_HINT ""
public static final int PKT_HEADER_LEN 21

org.apache.hadoop.hdfs.server.datanode.FSDataset
public static final String METADATA_EXTENSION ".meta"
public static final short METADATA_VERSION 1

org.apache.hadoop.hdfs.server.namenode.BlockManager
public static final int DEFAULT_INITIAL_MAP_CAPACITY 16
public static final float DEFAULT_MAP_LOAD_FACTOR 0.75f
public static final int DEFAULT_MAX_CORRUPT_FILES_RETURNED 500

org.apache.hadoop.hdfs.server.namenode.DelegationTokenServlet
public static final String PATH_SPEC "/getDelegationToken"

org.apache.hadoop.hdfs.server.namenode.FSEditLog
public static final byte OP_INVALID -1

org.apache.hadoop.hdfs.server.namenode.NameNode
public static final int DEFAULT_PORT 8020

org.apache.hadoop.hdfs.server.namenode.NamenodeFsck
public static final String CORRUPT_STATUS "is CORRUPT"
public static final String FAILURE_STATUS "FAILED"
public static final int FIXING_DELETE 2
public static final int FIXING_MOVE 1
public static final int FIXING_NONE 0
public static final String HEALTHY_STATUS "is HEALTHY"
public static final String NONEXISTENT_STATUS "does not exist"

org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol
public static final int DISK_ERROR 1
public static final int DNA_ACCESSKEYUPDATE 7
public static final int DNA_FINALIZE 5
public static final int DNA_INVALIDATE 2
public static final int DNA_RECOVERBLOCK 6
public static final int DNA_REGISTER 4
public static final int DNA_SHUTDOWN 3
public static final int DNA_TRANSFER 1
public static final int DNA_UNKNOWN 0
public static final int FATAL_DISK_ERROR 3
public static final int INVALID_BLOCK 2
public static final int NOTIFY 0
public static final long versionID 24L

org.apache.hadoop.hdfs.server.protocol.InterDatanodeProtocol
public static final long versionID 5L

org.apache.hadoop.hdfs.server.protocol.NamenodeProtocol
public static final int ACT_CHECKPOINT 51
public static final int ACT_SHUTDOWN 50
public static final int ACT_UNKNOWN 0
public static final int FATAL 1
public static final byte JA_CHECKPOINT_TIME 103
public static final byte JA_IS_ALIVE 100
public static final byte JA_JOURNAL 101
public static final byte JA_JSPOOL_START 102
public static final int NOTIFY 0
public static final long versionID 4L

org.apache.hadoop.hdfs.server.protocol.UpgradeCommand
public static final int UC_ACTION_REPORT_STATUS 100
public static final int UC_ACTION_START_UPGRADE 101



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