cloudera manager 离线安装安装agent时,向主节点下载资源超时 20C

错误日志:
[19/Nov/2018 16:16:04 +0000] 2789 MainThread stacks_collection_manager INFO Using max_uncompressed_file_size_bytes: 5242880
[19/Nov/2018 16:16:04 +0000] 2789 MainThread init INFO Importing metric schema from file /opt/cloudera-manager/cm-5.10.2/lib64/cmf/agent/build/env/lib/python2.6/site-packages/cmf-5.10.2-py2.6.egg/cmf/monitor/schema.json
[19/Nov/2018 16:16:04 +0000] 2789 MainThread agent INFO Supervised processes will add the following to their environment (in addition to the supervisor's env): {'CDH_PARQUET_HOME': '/usr/lib/parquet', 'JSVC_HOME': '/usr/libexec/bigtop-utils', 'CMF_PACKAGE_DIR': '/opt/cloudera-manager/cm-5.10.2/lib64/cmf/service', 'CDH_HADOOP_BIN': '/usr/bin/hadoop', 'MGMT_HOME': '/opt/cloudera-manager/cm-5.10.2/share/cmf', 'CDH_IMPALA_HOME': '/usr/lib/impala', 'CDH_YARN_HOME': '/usr/lib/hadoop-yarn', 'CDH_HDFS_HOME': '/usr/lib/hadoop-hdfs', 'PATH': '/sbin:/usr/sbin:/bin:/usr/bin', 'CDH_HUE_PLUGINS_HOME': '/usr/lib/hadoop', 'CM_STATUS_CODES': u'STATUS_NONE HDFS_DFS_DIR_NOT_EMPTY HBASE_TABLE_DISABLED HBASE_TABLE_ENABLED JOBTRACKER_IN_STANDBY_MODE YARN_RM_IN_STANDBY_MODE', 'KEYTRUSTEE_KP_HOME': '/usr/share/keytrustee-keyprovider', 'CLOUDERA_ORACLE_CONNECTOR_JAR': '/usr/share/java/oracle-connector-java.jar', 'CDH_SQOOP2_HOME': '/usr/lib/sqoop2', 'KEYTRUSTEE_SERVER_HOME': '/usr/lib/keytrustee-server', 'CDH_MR2_HOME': '/usr/lib/hadoop-mapreduce', 'HIVE_DEFAULT_XML': '/etc/hive/conf.dist/hive-default.xml', 'CLOUDERA_POSTGRESQL_JDBC_JAR': '/opt/cloudera-manager/cm-5.10.2/share/cmf/lib/postgresql-9.0-801.jdbc4.jar', 'CDH_KMS_HOME': '/usr/lib/hadoop-kms', 'CDH_HBASE_HOME': '/usr/lib/hbase', 'CDH_SQOOP_HOME': '/usr/lib/sqoop', 'WEBHCAT_DEFAULT_XML': '/etc/hive-webhcat/conf.dist/webhcat-default.xml', 'CDH_OOZIE_HOME': '/usr/lib/oozie', 'CDH_ZOOKEEPER_HOME': '/usr/lib/zookeeper', 'CDH_HUE_HOME': '/usr/lib/hue', 'CLOUDERA_MYSQL_CONNECTOR_JAR': '/usr/share/java/mysql-connector-java.jar', 'CDH_HBASE_INDEXER_HOME': '/usr/lib/hbase-solr', 'CDH_MR1_HOME': '/usr/lib/hadoop-0.20-mapreduce', 'CDH_SOLR_HOME': '/usr/lib/solr', 'CDH_PIG_HOME': '/usr/lib/pig', 'CDH_SENTRY_HOME': '/usr/lib/sentry', 'CDH_CRUNCH_HOME': '/usr/lib/crunch', 'CDH_LLAMA_HOME': '/usr/lib/llama/', 'CDH_HTTPFS_HOME': '/usr/lib/hadoop-httpfs', 'ROOT': '/opt/cloudera-manager/cm-5.10.2/lib64/cmf', 'CDH_HADOOP_HOME': '/usr/lib/hadoop', 'CDH_HIVE_HOME': '/usr/lib/hive', 'ORACLE_HOME': '/usr/share/oracle/instantclient', 'CDH_HCAT_HOME': '/usr/lib/hive-hcatalog', 'CDH_KAFKA_HOME': '/usr/lib/kafka', 'CDH_SPARK_HOME': '/usr/lib/spark', 'TOMCAT_HOME': '/usr/lib/bigtop-tomcat', 'CDH_FLUME_HOME': '/usr/lib/flume-ng'}
[19/Nov/2018 16:16:04 +0000] 2789 MainThread agent INFO To override these variables, use /etc/cloudera-scm-agent/config.ini. Environment variables for CDH locations are not used when CDH is installed from parcels.
[19/Nov/2018 16:16:04 +0000] 2789 MainThread agent INFO Created /opt/cloudera-manager/cm-5.10.2/run/cloudera-scm-agent/process
[19/Nov/2018 16:16:04 +0000] 2789 MainThread agent INFO Chmod'ing /opt/cloudera-manager/cm-5.10.2/run/cloudera-scm-agent/process to 0751
[19/Nov/2018 16:16:04 +0000] 2789 MainThread agent INFO Created /opt/cloudera-manager/cm-5.10.2/run/cloudera-scm-agent/supervisor
[19/Nov/2018 16:16:04 +0000] 2789 MainThread agent INFO Chmod'ing /opt/cloudera-manager/cm-5.10.2/run/cloudera-scm-agent/supervisor to 0751
[19/Nov/2018 16:16:04 +0000] 2789 MainThread agent INFO Created /opt/cloudera-manager/cm-5.10.2/run/cloudera-scm-agent/flood
[19/Nov/2018 16:16:04 +0000] 2789 MainThread agent INFO Chowning /opt/cloudera-manager/cm-5.10.2/run/cloudera-scm-agent/flood to cloudera-scm (498) cloudera-scm (498)
[19/Nov/2018 16:16:04 +0000] 2789 MainThread agent INFO Chmod'ing /opt/cloudera-manager/cm-5.10.2/run/cloudera-scm-agent/flood to 0751
[19/Nov/2018 16:16:04 +0000] 2789 MainThread agent INFO Created /opt/cloudera-manager/cm-5.10.2/run/cloudera-scm-agent/supervisor/include
[19/Nov/2018 16:16:04 +0000] 2789 MainThread agent INFO Chmod'ing /opt/cloudera-manager/cm-5.10.2/run/cloudera-scm-agent/supervisor/include to 0751
[19/Nov/2018 16:16:04 +0000] 2789 MainThread agent ERROR Failed to connect to previous supervisor.
Traceback (most recent call last):
File "/opt/cloudera-manager/cm-5.10.2/lib64/cmf/agent/build/env/lib/python2.6/site-packages/cmf-5.10.2-py2.6.egg/cmf/agent.py", line 2073, in find_or_start_supervisor
self.configure_supervisor_clients()
File "/opt/cloudera-manager/cm-5.10.2/lib64/cmf/agent/build/env/lib/python2.6/site-packages/cmf-5.10.2-py2.6.egg/cmf/agent.py", line 2254, in configure_supervisor_clients
supervisor_options.realize(args=["-c", os.path.join(self.supervisor_dir, "supervisord.conf")])
File "/opt/cloudera-manager/cm-5.10.2/lib64/cmf/agent/build/env/lib/python2.6/site-packages/supervisor-3.0-py2.6.egg/supervisor/options.py", line 1599, in realize
Options.realize(self, *arg, **kw)
File "/opt/cloudera-manager/cm-5.10.2/lib64/cmf/agent/build/env/lib/python2.6/site-packages/supervisor-3.0-py2.6.egg/supervisor/options.py", line 333, in realize
self.process_config()
File "/opt/cloudera-manager/cm-5.10.2/lib64/cmf/agent/build/env/lib/python2.6/site-packages/supervisor-3.0-py2.6.egg/supervisor/options.py", line 341, in process_config
self.process_config_file(do_usage)
File "/opt/cloudera-manager/cm-5.10.2/lib64/cmf/agent/build/env/lib/python2.6/site-packages/supervisor-3.0-py2.6.egg/supervisor/options.py", line 376, in process_config_file
self.usage(str(msg))
File "/opt/cloudera-manager/cm-5.10.2/lib64/cmf/agent/build/env/lib/python2.6/site-packages/supervisor-3.0-py2.6.egg/supervisor/options.py", line 164, in usage
self.exit(2)
SystemExit: 2
[19/Nov/2018 16:16:04 +0000] 2789 MainThread tmpfs INFO Successfully mounted tmpfs at /opt/cloudera-manager/cm-5.10.2/run/cloudera-scm-agent/process
[19/Nov/2018 16:16:05 +0000] 2789 MainThread agent INFO Trying to connect to newly launched supervisor (Attempt 1)
[19/Nov/2018 16:16:05 +0000] 2789 MainThread agent INFO Supervisor version: 3.0, pid: 2821
[19/Nov/2018 16:16:05 +0000] 2789 MainThread agent INFO Successfully connected to supervisor
[19/Nov/2018 16:16:05 +0000] 2789 MainThread status_server INFO Using maximum impala profile bundle size of 1073741824 bytes.
[19/Nov/2018 16:16:05 +0000] 2789 MainThread status_server INFO Using maximum stacks log bundle size of 1073741824 bytes.
[19/Nov/2018 16:16:05 +0000] 2789 MainThread cplogging INFO [19/Nov/2018:16:16:05] ENGINE Bus STARTING
[19/Nov/2018 16:16:05 +0000] 2789 MainThread _cplogging INFO [19/Nov/2018:16:16:05] ENGINE Started monitor thread '_TimeoutMonitor'.
[19/Nov/2018 16:16:06 +0000] 2789 MainThread _cplogging INFO [19/Nov/2018:16:16:06] ENGINE Serving on yingzhi01.com:9000
[19/Nov/2018 16:16:06 +0000] 2789 MainThread _cplogging INFO [19/Nov/2018:16:16:06] ENGINE Bus STARTED
[19/Nov/2018 16:16:06 +0000] 2789 MainThread __init
_ INFO New monitor: (,)
[19/Nov/2018 16:16:06 +0000] 2789 MonitorDaemon-Scheduler init INFO Monitor ready to report: ('HostMonitor',)
[19/Nov/2018 16:16:06 +0000] 2789 MainThread agent INFO Setting default socket timeout to 30
[19/Nov/2018 16:16:06 +0000] 2789 Monitor-HostMonitor network_interfaces INFO NIC iface eth0 doesn't support ETHTOOL (95)
[19/Nov/2018 16:16:06 +0000] 2789 Monitor-HostMonitor throttling_logger ERROR Error getting directory attributes for /opt/cloudera-manager/cm-5.10.2/log/cloudera-scm-agent
Traceback (most recent call last):
File "/opt/cloudera-manager/cm-5.10.2/lib64/cmf/agent/build/env/lib/python2.6/site-packages/cmf-5.10.2-py2.6.egg/cmf/monitor/dir_monitor.py", line 90, in get_directory_attributes
name = pwd.getpwuid(uid)[0]
KeyError: 'getpwuid(): uid not found: 1106'
[19/Nov/2018 16:16:06 +0000] 2789 MainThread heartbeat_tracker INFO HB stats (seconds): num:1 LIFE_MIN:0.22 min:0.22 mean:0.22 max:0.22 LIFE_MAX:0.22
[19/Nov/2018 16:16:06 +0000] 2789 MainThread agent INFO CM server guid: dceeafae-a884-42f1-ba7b-4ee187ef3bef
[19/Nov/2018 16:16:06 +0000] 2789 MainThread agent INFO Using parcels directory from server provided value: /opt/cloudera/parcels
[19/Nov/2018 16:16:06 +0000] 2789 MainThread agent WARNING Expected user root for /opt/cloudera/parcels but was cloudera-scm
[19/Nov/2018 16:16:06 +0000] 2789 MainThread agent WARNING Expected group root for /opt/cloudera/parcels but was cloudera-scm
[19/Nov/2018 16:16:06 +0000] 2789 MainThread agent INFO Created /opt/cloudera/parcel-cache
[19/Nov/2018 16:16:06 +0000] 2789 MainThread agent INFO Chowning /opt/cloudera/parcel-cache to root (0) root (0)
[19/Nov/2018 16:16:06 +0000] 2789 MainThread agent INFO Chmod'ing /opt/cloudera/parcel-cache to 0755
[19/Nov/2018 16:16:06 +0000] 2789 MainThread parcel INFO Agent does create users/groups and apply file permissions
[19/Nov/2018 16:16:06 +0000] 2789 MainThread downloader INFO Downloader path: /opt/cloudera/parcel-cache
[19/Nov/2018 16:16:06 +0000] 2789 MainThread parcel_cache INFO Using /opt/cloudera/parcel-cache for parcel cache
[19/Nov/2018 16:16:06 +0000] 2789 MainThread agent INFO Flood daemon (re)start attempt
[19/Nov/2018 16:16:06 +0000] 2789 MainThread agent INFO Created /opt/cloudera/parcels/.flood
[19/Nov/2018 16:16:06 +0000] 2789 MainThread agent INFO Chowning /opt/cloudera/parcels/.flood to cloudera-scm (498) cloudera-scm (498)
[19/Nov/2018 16:16:06 +0000] 2789 MainThread agent INFO Chmod'ing /opt/cloudera/parcels/.flood to 0755
[19/Nov/2018 16:16:06 +0000] 2789 MainThread agent INFO Triggering supervisord update.
[19/Nov/2018 16:16:36 +0000] 2789 MainThread downloader ERROR Failed rack peer update: timed out
[19/Nov/2018 16:16:36 +0000] 2789 MainThread agent INFO Active parcel list updated; recalculating component info.
[19/Nov/2018 16:16:36 +0000] 2789 MainThread throttling_logger WARNING CMF_AGENT_JAVA_HOME environment variable host override will be deprecated in future. JAVA_HOME setting configured from CM server takes precedence over host agent override. Configure JAVA_HOME setting from CM server.
[19/Nov/2018 16:16:36 +0000] 2789 MainThread throttling_logger INFO Identified java component java8 with full version JAVA_HOME=/opt/modules/jdk1.8.0_144 java version "1.8.0_144" Java(TM) SE Runtime Environment (build 1.8.0_144-b01) Java HotSpot(TM) 64-Bit Server VM (build 25.144-b01, mixed mode) for requested version .
[19/Nov/2018 16:16:36 +0000] 2789 MainThread agent WARNING Long HB processing time: 30.6659779549
[19/Nov/2018 16:16:36 +0000] 2789 MainThread agent WARNING Delayed HB: 15s since last
[19/Nov/2018 16:16:44 +0000] 2789 Monitor-HostMonitor throttling_logger ERROR Timeout with args ['ntpdc', '-np']
None
[19/Nov/2018 16:16:44 +0000] 2789 Monitor-HostMonitor throttling_logger ERROR Failed to collect NTP metrics
Traceback (most recent call last):
File "/opt/cloudera-manager/cm-5.10.2/lib64/cmf/agent/build/env/lib/python2.6/site-packages/cmf-5.10.2-py2.6.egg/cmf/monitor/host/ntp_monitor.py", line 48, in collect
self.collect_ntpd()
File "/opt/cloudera-manager/cm-5.10.2/lib64/cmf/agent/build/env/lib/python2.6/site-packages/cmf-5.10.2-py2.6.egg/cmf/monitor/host/ntp_monitor.py", line 66, in collect_ntpd
result, stdout, stderr = self._subprocess_with_timeout(args, self._timeout)
File "/opt/cloudera-manager/cm-5.10.2/lib64/cmf/agent/build/env/lib/python2.6/site-packages/cmf-5.10.2-py2.6.egg/cmf/monitor/host/ntp_monitor.py", line 38, in _subprocess_with_timeout
return subprocess_with_timeout(args, timeout)
File "/opt/cloudera-manager/cm-5.10.2/lib64/cmf/agent/build/env/lib/python2.6/site-packages/cmf-5.10.2-py2.6.egg/cmf/subprocess_timeout.py", line 94, in subprocess_with_timeout
raise Exception("timeout with args %s" % args)
Exception: timeout with args ['ntpdc', '-np']
[19/Nov/2018 16:17:06 +0000] 2789 DnsResolutionMonitor throttling_logger INFO Using java location: '/opt/modules/jdk1.8.0_144/bin/java'.
[19/Nov/2018 16:17:06 +0000] 2789 MainThread downloader ERROR Failed rack peer update: timed out
[19/Nov/2018 16:17:06 +0000] 2789 MainThread agent WARNING Long HB processing time: 30.1082139015
[19/Nov/2018 16:17:06 +0000] 2789 MainThread agent WARNING Delayed HB: 15s since last
[19/Nov/2018 16:17:36 +0000] 2789 MainThread downloader ERROR Failed rack peer update: timed out
[19/Nov/2018 16:17:36 +0000] 2789 MainThread agent WARNING Long HB processing time: 30.1235852242
[19/Nov/2018 16:17:36 +0000] 2789 MainThread agent WARNING Delayed HB: 15s since last
[19/Nov/2018 16:18:07 +0000] 2789 MainThread downloader ERROR Failed rack peer update: timed out
[19/Nov/2018 16:18:07 +0000] 2789 MainThread agent WARNING Long HB processing time: 30.1040799618
[19/Nov/2018 16:18:07 +0000] 2789 MainThread agent WARNING Delayed HB: 15s since last
[19/Nov/2018 16:18:37 +0000] 2789 MainThread downloader ERROR Failed rack peer update: timed out
[19/Nov/2018 16:18:37 +0000] 2789 MainThread agent WARNING Long HB processing time: 30.1849529743
[19/Nov/2018 16:18:37 +0000] 2789 MainThread agent WARNING Delayed HB: 15s since last
[19/Nov/2018 16:19:07 +0000] 2789 MainThread downloader ERROR Failed rack peer update: timed out
[19/Nov/2018 16:19:07 +0000] 2789 MainThread agent WARNING Long HB processing time: 30.1211960316
[19/Nov/2018 16:19:07 +0000] 2789 MainThread agent WARNING Delayed HB: 15s since last
[19/Nov/2018 16:19:37 +0000] 2789 MainThread downloader ERROR Failed rack peer update: timed out
[19/Nov/2018 16:19:37 +0000] 2789 MainThread agent WARNING Long HB processing time: 30.1215620041
[19/Nov/2018 16:19:37 +0000] 2789 MainThread agent WARNING Delayed HB: 15s since last
[19/Nov/2018 16:20:01 +0000] 2789 CP Server Thread-4 _cplogging INFO 192.168.164.35 - - [19/Nov/2018:16:20:01] "GET /heartbeat HTTP/1.1" 200 2 "" "NING/1.0"
[19/Nov/2018 16:20:04 +0000] 2789 CP Server Thread-5 _cplogging INFO 192.168.164.35 - - [19/Nov/2018:16:20:04] "GET /heartbeat HTTP/1.1" 200 2 "" "NING/1.0"
[19/Nov/2018 16:20:07 +0000] 2789 MainThread downloader ERROR Failed rack peer update: timed out
[19/Nov/2018 16:20:07 +0000] 2789 MainThread agent WARNING Long HB processing time: 30.1212861538
[19/Nov/2018 16:20:07 +0000] 2789 MainThread agent WARNING Delayed HB: 15s since last
[19/Nov/2018 16:20:37 +0000] 2789 MainThread downloader ERROR Failed rack peer update: timed out
[19/Nov/2018 16:20:37 +0000] 2789 MainThread agent WARNING Long HB processing time: 30.1753029823
[19/Nov/2018 16:20:37 +0000] 2789 MainThread agent WARNING Delayed HB: 15s since last
[19/Nov/2018 16:20:37 +0000] 2789 Thread-13 downloader INFO Fetching torrent: http://yingzhi01.com:7180/cmf/parcel/download/CDH-5.10.2-1.cdh5.10.2.p0.5-el6.parcel.torrent
[19/Nov/2018 16:20:37 +0000] 2789 Thread-13 downloader INFO Starting download of: http://yingzhi01.com:7180/cmf/parcel/download/CDH-5.10.2-1.cdh5.10.2.p0.5-el6.parcel
[19/Nov/2018 16:21:07 +0000] 2789 Thread-13 downloader ERROR Unexpected exception during download
Traceback (most recent call last):
File "/opt/cloudera-manager/cm-5.10.2/lib64/cmf/agent/build/env/lib/python2.6/site-packages/cmf-5.10.2-py2.6.egg/cmf/downloader.py", line 279, in download
self.client.AddTorrent(torrent_url)
File "/opt/cloudera-manager/cm-5.10.2/lib64/cmf/agent/build/env/lib/python2.6/site-packages/cmf-5.10.2-py2.6.egg/flood/util/cmd.py", line 159, in __call
_
return self.fn.__get__(self.binding)(*args, **kwargs)
File "/opt/cloudera-manager/cm-5.10.2/lib64/cmf/agent/build/env/lib/python2.6/site-packages/cmf-5.10.2-py2.6.egg/flood/util/rpc.py", line 68, in
return lambda *pargs, **kwargs: self._invoke(*pargs, **kwargs)
File "/opt/cloudera-manager/cm-5.10.2/lib64/cmf/agent/build/env/lib/python2.6/site-packages/cmf-5.10.2-py2.6.egg/flood/util/rpc.py", line 77, in invoke
return rpcClient.requestor.request(self.schema.name, msg)
File "/opt/cloudera-manager/cm-5.10.2/lib64/cmf/agent/build/env/lib/python2.6/site-packages/cmf-5.10.2-py2.6.egg/flood/util/rpc.py", line 129, in requestor
return avro.ipc.Requestor(self.SCHEMA, self.transceiver)
File "/opt/cloudera-manager/cm-5.10.2/lib64/cmf/agent/build/env/lib/python2.6/site-packages/cmf-5.10.2-py2.6.egg/flood/util/rpc.py", line 125, in transceiver
return avro.ipc.HTTPTransceiver(self.server.host, self.server.port)
File "/opt/cloudera-manager/cm-5.10.2/lib64/cmf/agent/build/env/lib/python2.6/site-packages/avro-1.6.3-py2.6.egg/avro/ipc.py", line 469, in __init
_
self.conn.connect()
File "/usr/lib64/python2.6/httplib.py", line 771, in connect
self.timeout)
File "/usr/lib64/python2.6/socket.py", line 567, in create_connection
raise error, msg
timeout: timed out
[19/Nov/2018 16:21:07 +0000] 2789 Thread-13 downloader INFO Finished download [ url: http://yingzhi01.com:7180/cmf/parcel/download/CDH-5.10.2-1.cdh5.10.2.p0.5-el6.parcel, state: exception, total_bytes: 0, downloaded_bytes: 0, start_time: 2018-11-19 16:20:37, download_end_time: , end_time: 2018-11-19 16:21:07, code: 600, exception_msg: timed out, path: None ]
[19/Nov/2018 16:21:07 +0000] 2789 MainThread downloader ERROR Failed rack peer update: timed out
[19/Nov/2018 16:21:07 +0000] 2789 MainThread agent WARNING Long HB processing time: 30.1247620583
[19/Nov/2018 16:21:07 +0000] 2789 MainThread agent WARNING Delayed HB: 15s since last
[19/Nov/2018 16:21:07 +0000] 2789 Thread-13 downloader INFO Fetching torrent: http://yingzhi01.com:7180/cmf/parcel/download/CDH-5.10.2-1.cdh5.10.2.p0.5-el6.parcel.torrent
[19/Nov/2018 16:21:08 +0000] 2789 Thread-13 downloader INFO Starting download of: http://yingzhi01.com:7180/cmf/parcel/download/CDH-5.10.2-1.cdh5.10.2.p0.5-el6.parcel
[19/Nov/2018 16:21:38 +0000] 2789 Thread-13 downloader ERROR Unexpected exception during download

然后就是不断重复超时错误求大神指点。。。

1个回答

yhntgbrfv1
yhntgbrfv1 并不是这个问题!而是选择完机器之后的安装页面一直卡在那!log报错连接超时
大约一年之前 回复
Csdn user default icon
上传中...
上传图片
插入图片
抄袭、复制答案,以达到刷声望分或其他目的的行为,在CSDN问答是严格禁止的,一经发现立刻封号。是时候展现真正的技术了!
其他相关推荐
cloudera manager离线安装离线安装,启动agen t失败
在log目录下的agent目录下看到提示: /opt/cm-4.8.1/sbin/cmf-agent: line 34: /opt/cm-4.8.1/lib64/cmf/agent/build/env/ bin/python: cannot execute binary file /opt/cm-4.8.1/sbin/cmf-agent: line 34: /opt/cm-4.8.1/lib64/cmf/agent/build/env/ bin/python: Success 启动agent失败
安装CDH过程中无法安装cloudera-manager-agent
系统是CENTOS7.2,安装CDH5.11.1。为什么在安装的时候老是会报错有依赖包没装?CM WEB端或者直接系统中安装都 不会。到底是哪里出问题了,有大神帮忙 吗》》???谢谢 [root@master yum.repos.d]# yum -y install cloudera-manager-agent.x86_64 Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile Resolving Dependencies There are unfinished transactions remaining. You might consider running yum-complete-transaction, or "yum-complete-transaction --cleanup-only" and "yum history redo last", first to finish them. If those don't work you'll have to try removing/installing packages by hand (maybe package-cleanup can help). --> Running transaction check ---> Package cloudera-manager-agent.x86_64 0:5.11.1-1.cm5111.p0.9.el7 will be installed --> Processing Dependency: python-psycopg2 for package: cloudera-manager-agent-5.11.1-1.cm5111.p0.9.el7.x86_64 --> Processing Dependency: openssl-devel for package: cloudera-manager-agent-5.11.1-1.cm5111.p0.9.el7.x86_64 --> Processing Dependency: MySQL-python for package: cloudera-manager-agent-5.11.1-1.cm5111.p0.9.el7.x86_64 --> Processing Dependency: /lib/lsb/init-functions for package: cloudera-manager-agent-5.11.1-1.cm5111.p0.9.el7.x86_64 --> Processing Dependency: /lib/lsb/init-functions for package: cloudera-manager-agent-5.11.1-1.cm5111.p0.9.el7.x86_64 --> Finished Dependency Resolution Error: Package: cloudera-manager-agent-5.11.1-1.cm5111.p0.9.el7.x86_64 (cloudera-manager) Requires: MySQL-python Error: Package: cloudera-manager-agent-5.11.1-1.cm5111.p0.9.el7.x86_64 (cloudera-manager) Requires: openssl-devel Error: Package: cloudera-manager-agent-5.11.1-1.cm5111.p0.9.el7.x86_64 (cloudera-manager) Requires: python-psycopg2 Error: Package: cloudera-manager-agent-5.11.1-1.cm5111.p0.9.el7.x86_64 (cloudera-manager) Requires: /lib/lsb/init-functions You could try using --skip-broken to work around the problem ** Found 4 pre-existing rpmdb problem(s), 'yum check' output follows: MariaDB-client-10.2.1-1.el7.centos.x86_64 has missing requires of MariaDB-common MariaDB-server-10.2.1-1.el7.centos.x86_64 has missing requires of MariaDB-common 2:postfix-2.10.1-6.el7.x86_64 has missing requires of libmysqlclient.so.18()(64bit) 2:postfix-2.10.1-6.el7.x86_64 has missing requires of libmysqlclient.so.18(libmysqlclient_18)(64bit)
cloudera manager CM-5.11.2,启动完少一个主机(server主机)
cloudera manager CM-5.11.2,启动完少一个主机(server主机) 两台机器的agent都启动成功了 如题,装了CM5.11.2,一个server 一个agent; 登录页面设置的时候,只显示一台子节点agent主机没有主节点; 有相同情况的朋友说下解决办法??(mysql里面的CM数据库hosts表,看了,只有1个agent 的信息,没有server那台机的)
Cloudera公司出的CDH和Cloudera Manager是什么关系?
Cloudera Manager是CDH的一个组件? Cloudera Manager是什么? CDH是什么?
cloudera manager启动 agent报错
![![图片说明](https://img-ask.csdn.net/upload/201712/29/1514540428_151470.png)图片说明](https://img-ask.csdn.net/upload/201712/29/1514540420_778115.png启动报错哪位大神给讲解一下
cloudera manager管理已有cdh集群
有cdh集群,hdfs有庞大数据,现在想用cloudera manager来管理该cdh集群,请问有什么方法在cloudera manager添加已有hdfs服务的,有过这方面经验的大神分享一下经验~
怎样使用cloudera manager接管已经安装好的CDH集群
网上找了好久没有具体的方法,如果有大佬这样操作过可以指点一下,或者写篇博客,不胜感激!
cloudera manager安装后,主机显示红,无法与服务器端建立联系
1./etc/hosts 文件配置完成 2./etc/cloudera-scm-agent/config.ini 文件中的server指向服务器。 3.selinux与防火墙关闭 ps:不是个例,总共为3个节点,除了服务器端,剩下的两个节点都显示不健康状态 ,且同样问题:This host is not in contact with the Host Monitor.
cloudera manager上启用Kerberos失败问题求助
CDH版本5.7。 cloudera manager上启用Kerberos失败,配置文件如下: /etc/krb5.conf [libdefaults] default_realm = BIGDATA.COM dns_lookup_realm = false dns_lookup_kdc = false ticket_lifetime = 7d #ticket_lifetime = 2147483647 renew_lifetime = 30d #renew_lifetime = 2147483647 forwardable = true #renewable = true [realms] BIGDATA.COM = { kdc =bigdata-m-003 admin_server = bigdata-m-003 } [domain_realm] .bigdata.com = BIGDATA.COM bigdata.com = BIGDATA.COM /var/kerberos/krb5kdc/kadm5.acl */admin@BIGDATA.COM * /var/kerberos/krb5kdc/kdc.conf [kdcdefaults] kdc_ports = 88 kdc_tcp_ports = 88 [realms] BIGDATA.COM= { #master_key_type = aes256-cts acl_file = /var/kerberos/krb5kdc/kadm5.acl dict_file = /usr/share/dict/words admin_keytab = /var/kerberos/krb5kdc/kadm5.keytab supported_enctypes = rc4-hmac:normal aes256-cts:normal aes128-cts:normal des3-hmac-sha1:normal arcfour-hmac:normal des-hmac-sha1:normal des-cbc-md5:normal des-cbc-crc:normal max_life = 1d 0h 0m 0s max_renewable_life = 5d 0h 0m 0s } Cloudera Manager启用Kerberos过程中基本采用默认配置,KDC类型MIT KDC,加密类型为rc4-hmac,Kerberos Principal最大可更新生命周期为0,勾选了通过Cloudera Manager管理krb5.conf,KDC Account Manager凭据导入无报错。但后续启用过程失败。 该问题前后分为两个现象: 1.当环境中主机名中还存在大写字母时,比如有主机名为Bigdata-m-001,hadoop各组件相关凭据生成正常,类似于HTTP/Bigdata-m-001@BIGDATA.COM,但是在组件启动时会说因为找不到HTTP/bigdata-m-001@BIGDATA.COM而启动失败。多方调查认为是主机名不该存在大写字母的问题。 2.主机名都改为小写以后,Cloudera Manager中所有主机名有关的配置也更新为小写了。不启用Kerberos时集群运行正常。启用Kerberos后,在生成丢失的凭据这一步只有以下凭据能够成功生成。其它凭据例如HTTP/bigdata-m-001@BIGDATA.COM全部无法生成,也没有任何报错。 ![Kerberos凭据页面](https://img-ask.csdn.net/upload/201708/02/1501641809_237542.jpg) 求各位大神看看是怎么回事,怎么解决。
cloudera manager安装,在网页上安装CDH,三台机器显示无法进行身份验证
![图片说明](https://img-ask.csdn.net/upload/201707/11/1499744684_457602.jpg) SSH免密已经能从主节点访问另外2个节点了。,请大神
cloudera manager安装yarn服务,在启动yarn报错:
Error starting NodeManager org.apache.hadoop.service.ServiceStateException: org.fusesource.leveldbjni.internal.NativeDB$DBException: IO error: /var/lib/hadoop-yarn/yarn-nm-recovery/yarn-nm-state/LOCK: Permission denied at org.apache.hadoop.service.ServiceStateException.convert(ServiceStateException.java:59) at org.apache.hadoop.service.AbstractService.init(AbstractService.java:172) at org.apache.hadoop.yarn.server.nodemanager.NodeManager.initAndStartRecoveryStore(NodeManager.java:157) at org.apache.hadoop.yarn.server.nodemanager.NodeManager.serviceInit(NodeManager.java:195) at org.apache.hadoop.service.AbstractService.init(AbstractService.java:163) at org.apache.hadoop.yarn.server.nodemanager.NodeManager.initAndStartNodeManager(NodeManager.java:474) at org.apache.hadoop.yarn.server.nodemanager.NodeManager.main(NodeManager.java:521) Caused by: org.fusesource.leveldbjni.internal.NativeDB$DBException: IO error: /var/lib/hadoop-yarn/yarn-nm-recovery/yarn-nm-state/LOCK: Permission denied at org.fusesource.leveldbjni.internal.NativeDB.checkStatus(NativeDB.java:200) at org.fusesource.leveldbjni.internal.NativeDB.open(NativeDB.java:218) at org.fusesource.leveldbjni.JniDBFactory.open(JniDBFactory.java:168) at org.apache.hadoop.yarn.server.nodemanager.recovery.NMLeveldbStateStoreService.initStorage(NMLeveldbStateStoreService.java:864) at org.apache.hadoop.yarn.server.nodemanager.recovery.NMStateStoreService.serviceInit(NMStateStoreService.java:195) at org.apache.hadoop.service.AbstractService.init(AbstractService.java:163) ... 5 more
cloudera manager CM-5.8.0,启动完少一个主机(server主机)
如题,装了CM5.8.0,一个server ,两个agent; 登录页面设置的时候,只显示两台agent主机; 环境配置应该没问题的,之前运行过一次CM三台正常。 因为内存不足重装了CM,就这样了。。。 * 有相同情况的朋友说下解决办法??(mysql里面的CM数据库host表,看了,只有2个agent 的信息,没有server那台机的)
cloudera manager提供的api是否可以直接通过下载好的jar进行连接?
我自己通过将下载好的jar倒入项目,想通过cloudera manger 提供的API连接远程集群,但是为什么会一直报错?代码与结果运行如下图:
Cloudera manager 中 HDFS 运行测试报错 群集中有 1 个 丢失块 块。群集中共有 315,335 个块。百分比 丢失块: 0.00%。 临界阈值:任意。
![图片说明](https://img-ask.csdn.net/upload/201910/14/1571061538_368832.jpg)求大佬们指点解决
cloudera Manager集群设置时候hue起不来
![图片说明](https://img-ask.csdn.net/upload/201801/02/1514884371_978003.png) 请大神们帮忙!!!!!!!!!!!!!!!!
选定的 Parcel 正在下载并安装在群集的所有主机上失败
CM6安装CDH6的时候到了这一步出现了这个问题![图片说明](https://img-ask.csdn.net/upload/201910/31/1572506575_776628.png) 下图是/var/log/cloudera-scm-agent/cloudera-scm-agent.log的报错信息 ![图片说明](https://img-ask.csdn.net/upload/201910/31/1572506709_116880.png) Traceback (most recent call last): File "/opt/cloudera/cm-agent/lib/python2.7/site-packages/cmf/downloader.py", line 502, in callable callback(url, curr_op) File "/opt/cloudera/cm-agent/lib/python2.7/site-packages/cmf/parcel_cache.py", line 200, in cb raise e Exception: Src file /opt/cloudera/parcels/.flood/CDH-6.1.0-1.cdh6.1.0.p0.770702-el7.parcel/CDH-6.1.0-1.cdh6.1.0.p0.770702-el7.parcel does not exist
cloudera-scm-agent 启动成功之后立刻停止
![图片说明](https://img-ask.csdn.net/upload/201909/19/1568887363_692502.png) 查看日志如下: ![图片说明](https://img-ask.csdn.net/upload/201909/19/1568887419_113508.png) 说是守护进程停止,这个要怎么解决! server 和其他两台机器的agent都能启动!
centos7 配置cloudera 在web 群集安装 的install parcels 这一步分配完成后 报错
错误提示: ```Src file /opt/cloudera/parcels/.flood/CDH-6.1.0-1.cdh6.1.0.p0.770702-el7.parcel/CDH-6.1.0-1.cdh6.1.0.p0.770702-el7.parcel does not exist ``` 有人说是因为硬盘空间不足,可我还有40G空闲 ![图片说明](https://img-ask.csdn.net/upload/201907/09/1562681283_697061.png) #求指教
安装cdh5.15报错:Required List parameter 'hosts[]' is not present
cdh的版本是cloudera-manager-centos7-cm5.15.2_x86_64 报错如下所示:![图片说明](https://img-ask.csdn.net/upload/201910/14/1571061071_555782.png)![图片说明](https://img-ask.csdn.net/upload/201910/14/1571061083_912529.png) 有哪位大神碰到过这样的错误?大家有什么解决方法吗?望各位大佬不吝赐教。
相见恨晚的超实用网站
相见恨晚的超实用网站 持续更新中。。。
Java学习的正确打开方式
在博主认为,对于入门级学习java的最佳学习方法莫过于视频+博客+书籍+总结,前三者博主将淋漓尽致地挥毫于这篇博客文章中,至于总结在于个人,实际上越到后面你会发现学习的最好方式就是阅读参考官方文档其次就是国内的书籍,博客次之,这又是一个层次了,这里暂时不提后面再谈。博主将为各位入门java保驾护航,各位只管冲鸭!!!上天是公平的,只要不辜负时间,时间自然不会辜负你。 何谓学习?博主所理解的学习,它是一个过程,是一个不断累积、不断沉淀、不断总结、善于传达自己的个人见解以及乐于分享的过程。
程序员必须掌握的核心算法有哪些?
由于我之前一直强调数据结构以及算法学习的重要性,所以就有一些读者经常问我,数据结构与算法应该要学习到哪个程度呢?,说实话,这个问题我不知道要怎么回答你,主要取决于你想学习到哪些程度,不过针对这个问题,我稍微总结一下我学过的算法知识点,以及我觉得值得学习的算法。这些算法与数据结构的学习大多数是零散的,并没有一本把他们全部覆盖的书籍。下面是我觉得值得学习的一些算法以及数据结构,当然,我也会整理一些看过...
有哪些让程序员受益终生的建议
从业五年多,辗转两个大厂,出过书,创过业,从技术小白成长为基层管理,联合几个业内大牛回答下这个问题,希望能帮到大家,记得帮我点赞哦。 敲黑板!!!读了这篇文章,你将知道如何才能进大厂,如何实现财务自由,如何在工作中游刃有余,这篇文章很长,但绝对是精品,记得帮我点赞哦!!!! 一腔肺腑之言,能看进去多少,就看你自己了!!! 目录: 在校生篇: 为什么要尽量进大厂? 如何选择语言及方...
大学四年自学走来,这些私藏的实用工具/学习网站我贡献出来了
大学四年,看课本是不可能一直看课本的了,对于学习,特别是自学,善于搜索网上的一些资源来辅助,还是非常有必要的,下面我就把这几年私藏的各种资源,网站贡献出来给你们。主要有:电子书搜索、实用工具、在线视频学习网站、非视频学习网站、软件下载、面试/求职必备网站。 注意:文中提到的所有资源,文末我都给你整理好了,你们只管拿去,如果觉得不错,转发、分享就是最大的支持了。 一、电子书搜索 对于大部分程序员...
linux系列之常用运维命令整理笔录
本博客记录工作中需要的linux运维命令,大学时候开始接触linux,会一些基本操作,可是都没有整理起来,加上是做开发,不做运维,有些命令忘记了,所以现在整理成博客,当然vi,文件操作等就不介绍了,慢慢积累一些其它拓展的命令,博客不定时更新 free -m 其中:m表示兆,也可以用g,注意都要小写 Men:表示物理内存统计 total:表示物理内存总数(total=used+free) use...
比特币原理详解
一、什么是比特币 比特币是一种电子货币,是一种基于密码学的货币,在2008年11月1日由中本聪发表比特币白皮书,文中提出了一种去中心化的电子记账系统,我们平时的电子现金是银行来记账,因为银行的背后是国家信用。去中心化电子记账系统是参与者共同记账。比特币可以防止主权危机、信用风险。其好处不多做赘述,这一层面介绍的文章很多,本文主要从更深层的技术原理角度进行介绍。 二、问题引入 假设现有4个人...
程序员接私活怎样防止做完了不给钱?
首先跟大家说明一点,我们做 IT 类的外包开发,是非标品开发,所以很有可能在开发过程中会有这样那样的需求修改,而这种需求修改很容易造成扯皮,进而影响到费用支付,甚至出现做完了项目收不到钱的情况。 那么,怎么保证自己的薪酬安全呢? 我们在开工前,一定要做好一些证据方面的准备(也就是“讨薪”的理论依据),这其中最重要的就是需求文档和验收标准。一定要让需求方提供这两个文档资料作为开发的基础。之后开发...
网页实现一个简单的音乐播放器(大佬别看。(⊙﹏⊙))
今天闲着无事,就想写点东西。然后听了下歌,就打算写个播放器。 于是乎用h5 audio的加上js简单的播放器完工了。 演示地点演示 html代码如下` music 这个年纪 七月的风 音乐 ` 然后就是css`*{ margin: 0; padding: 0; text-decoration: none; list-...
Python十大装B语法
Python 是一种代表简单思想的语言,其语法相对简单,很容易上手。不过,如果就此小视 Python 语法的精妙和深邃,那就大错特错了。本文精心筛选了最能展现 Python 语法之精妙的十个知识点,并附上详细的实例代码。如能在实战中融会贯通、灵活使用,必将使代码更为精炼、高效,同时也会极大提升代码B格,使之看上去更老练,读起来更优雅。
数据库优化 - SQL优化
以实际SQL入手,带你一步一步走上SQL优化之路!
2019年11月中国大陆编程语言排行榜
2019年11月2日,我统计了某招聘网站,获得有效程序员招聘数据9万条。针对招聘信息,提取编程语言关键字,并统计如下: 编程语言比例 rank pl_ percentage 1 java 33.62% 2 cpp 16.42% 3 c_sharp 12.82% 4 javascript 12.31% 5 python 7.93% 6 go 7.25% 7 p...
通俗易懂地给女朋友讲:线程池的内部原理
餐盘在灯光的照耀下格外晶莹洁白,女朋友拿起红酒杯轻轻地抿了一小口,对我说:“经常听你说线程池,到底线程池到底是个什么原理?”
《奇巧淫技》系列-python!!每天早上八点自动发送天气预报邮件到QQ邮箱
将代码部署服务器,每日早上定时获取到天气数据,并发送到邮箱。 也可以说是一个小型人工智障。 知识可以运用在不同地方,不一定非是天气预报。
经典算法(5)杨辉三角
杨辉三角 是经典算法,这篇博客对它的算法思想进行了讲解,并有完整的代码实现。
英特尔不为人知的 B 面
从 PC 时代至今,众人只知在 CPU、GPU、XPU、制程、工艺等战场中,英特尔在与同行硬件芯片制造商们的竞争中杀出重围,且在不断的成长进化中,成为全球知名的半导体公司。殊不知,在「刚硬」的背后,英特尔「柔性」的软件早已经做到了全方位的支持与支撑,并持续发挥独特的生态价值,推动产业合作共赢。 而对于这一不知人知的 B 面,很多人将其称之为英特尔隐形的翅膀,虽低调,但是影响力却不容小觑。 那么,在...
腾讯算法面试题:64匹马8个跑道需要多少轮才能选出最快的四匹?
昨天,有网友私信我,说去阿里面试,彻底的被打击到了。问了为什么网上大量使用ThreadLocal的源码都会加上private static?他被难住了,因为他从来都没有考虑过这个问题。无独有偶,今天笔者又发现有网友吐槽了一道腾讯的面试题,我们一起来看看。 腾讯算法面试题:64匹马8个跑道需要多少轮才能选出最快的四匹? 在互联网职场论坛,一名程序员发帖求助到。二面腾讯,其中一个算法题:64匹...
面试官:你连RESTful都不知道我怎么敢要你?
干货,2019 RESTful最贱实践
刷了几千道算法题,这些我私藏的刷题网站都在这里了!
遥想当年,机缘巧合入了 ACM 的坑,周边巨擘林立,从此过上了"天天被虐似死狗"的生活… 然而我是谁,我可是死狗中的战斗鸡,智力不够那刷题来凑,开始了夜以继日哼哧哼哧刷题的日子,从此"读题与提交齐飞, AC 与 WA 一色 ",我惊喜的发现被题虐既刺激又有快感,那一刻我泪流满面。这么好的事儿作为一个正直的人绝不能自己独享,经过激烈的颅内斗争,我决定把我私藏的十几个 T 的,阿不,十几个刷题网...
SQL-小白最佳入门sql查询一
不要偷偷的查询我的个人资料,即使你再喜欢我,也不要这样,真的不好;
JavaScript 为什么能活到现在?
作者 | 司徒正美 责编 |郭芮 出品 | CSDN(ID:CSDNnews) JavaScript能发展到现在的程度已经经历不少的坎坷,早产带来的某些缺陷是永久性的,因此浏览器才有禁用JavaScript的选项。甚至在jQuery时代有人问出这样的问题,jQuery与JavaScript哪个快?在Babel.js出来之前,发明一门全新的语言代码代替JavaScript...
项目中的if else太多了,该怎么重构?
介绍 最近跟着公司的大佬开发了一款IM系统,类似QQ和微信哈,就是聊天软件。我们有一部分业务逻辑是这样的 if (msgType = "文本") { // dosomething } else if(msgType = "图片") { // doshomething } else if(msgType = "视频") { // doshomething } else { // doshom...
致 Python 初学者
欢迎来到“Python进阶”专栏!来到这里的每一位同学,应该大致上学习了很多 Python 的基础知识,正在努力成长的过程中。在此期间,一定遇到了很多的困惑,对未来的学习方向感到迷茫。我非常理解你们所面临的处境。我从2007年开始接触 python 这门编程语言,从2009年开始单一使用 python 应对所有的开发工作,直至今天。回顾自己的学习过程,也曾经遇到过无数的困难,也曾经迷茫过、困惑过。开办这个专栏,正是为了帮助像我当年一样困惑的 Python 初学者走出困境、快速成长。希望我的经验能真正帮到你
Python 编程开发 实用经验和技巧
Python是一门很灵活的语言,也有很多实用的方法,有时候实现一个功能可以用多种方法实现,我这里总结了一些常用的方法和技巧,包括小数保留指定位小数、判断变量的数据类型、类方法@classmethod、制表符中文对齐、遍历字典、datetime.timedelta的使用等,会持续更新......
吐血推荐珍藏的Visual Studio Code插件
作为一名Java工程师,由于工作需要,最近一个月一直在写NodeJS,这种经历可以说是一部辛酸史了。好在有神器Visual Studio Code陪伴,让我的这段经历没有更加困难。眼看这段经历要告一段落了,今天就来给大家分享一下我常用的一些VSC的插件。 VSC的插件安装方法很简单,只需要点击左侧最下方的插件栏选项,然后就可以搜索你想要的插件了。 下面我们进入正题 Material Theme ...
实战:如何通过python requests库写一个抓取小网站图片的小爬虫
有点爱好的你,偶尔应该会看点图片文字,最近小网站经常崩溃消失,不如想一个办法本地化吧,把小照片珍藏起来! 首先,准备一个珍藏的小网站,然后就可以开始啦! 第一步 我们先写一个获取网站的url的链接,因为url常常是由page或者,其他元素构成,我们就把他分离出来,我找到的网站主页下有图片区 图片区内有标题页,一个标题里有10张照片大概 所以步骤是: 第一步:进入图片区的标题页 def getH...
“狗屁不通文章生成器”登顶GitHub热榜,分分钟写出万字形式主义大作
一、垃圾文字生成器介绍 最近在浏览GitHub的时候,发现了这样一个骨骼清奇的雷人项目,而且热度还特别高。 项目中文名:狗屁不通文章生成器 项目英文名:BullshitGenerator 根据作者的介绍,他是偶尔需要一些中文文字用于GUI开发时测试文本渲染,因此开发了这个废话生成器。但由于生成的废话实在是太过富于哲理,所以最近已经被小伙伴们给玩坏了。 他的文风可能是这样的: 你发现,...
程序员:我终于知道post和get的区别
是一个老生常谈的话题,然而随着不断的学习,对于以前的认识有很多误区,所以还是需要不断地总结的,学而时习之,不亦说乎
《程序人生》系列-这个程序员只用了20行代码就拿了冠军
你知道的越多,你不知道的越多 点赞再看,养成习惯GitHub上已经开源https://github.com/JavaFamily,有一线大厂面试点脑图,欢迎Star和完善 前言 这一期不算《吊打面试官》系列的,所有没前言我直接开始。 絮叨 本来应该是没有这期的,看过我上期的小伙伴应该是知道的嘛,双十一比较忙嘛,要值班又要去帮忙拍摄年会的视频素材,还得搞个程序员一天的Vlog,还要写BU...
加快推动区块链技术和产业创新发展,2019可信区块链峰会在京召开
11月8日,由中国信息通信研究院、中国通信标准化协会、中国互联网协会、可信区块链推进计划联合主办,科技行者协办的2019可信区块链峰会将在北京悠唐皇冠假日酒店开幕。   区块链技术被认为是继蒸汽机、电力、互联网之后,下一代颠覆性的核心技术。如果说蒸汽机释放了人类的生产力,电力解决了人类基本的生活需求,互联网彻底改变了信息传递的方式,区块链作为构造信任的技术有重要的价值。   1...
相关热词 c#委托 逆变与协变 c#新建一个项目 c#获取dll文件路径 c#子窗体调用主窗体事件 c# 拷贝目录 c# 调用cef 网页填表c#源代码 c#部署端口监听项目、 c#接口中的属性使用方法 c# 昨天
立即提问