Question:
Reason: the oozie user cannot SSH remotely to the root user.
Solution:
1.vi /etc/passwd
oozie:x:973:967:Oozie User:/var/lib/oozie:/bin/false
Change to oozie: X: 973:967: oozie user:/var/lib/oozie:/bin/Bash
2. It can be executed: Su – oozie
3.ssh-keygen<Generate secret key
4.Cat / var/lib/oozie/.ssh/id_ rsa.pub
5. Send the generated public key to the remote server user
/ root/.ssh/authorized_ keys
Problem Description:
Webpack project report expected indentation of 0 spaces but found 2
Solution:
1. Find. Eslintrc.js in the project root directory
2. Add ‘indent’: ‘off’ in the rules tag
3. Restart project NPM run dev
Cause analysis:
Tip: fill in the analysis of the problem here:
for example, there are two ways for the handler to send messages, namely, handler. Obtainmessage() and handler. Sendmessage(). In obtainmessage mode, when the amount of data is too large, due to the limited size of messagequeue, when the message processing is not enough, the first transmitted data will be overwritten, resulting in data loss.
Solution:
Tip: fill in the specific solution to this problem here:
for example, create a new message object, store the read data in message, and then mhandler.obtainmessage (read)_ DATA, bytes, -1, buffer).sendToTarget(); Replace with mhandler. Sendmessage().
Idea created a springmvc project. Remember the error: 404
there was no error in accessing the servlet and the configuration file. Later, configure the support for the @ controller tag in springmvc.xml
<mvc:annotation-driven />
Successfully solved!
Version: cdh6.3.2
flick version: 1.13.2
CDH hive version: 2.1.1
Error message:
java.lang.NoSuchMethodError: org.apache.parquet.hadoop.ParquetWriter$Builder.<init>(Lorg/apache/parquet/io/OutputFile;)V
at org.apache.flink.formats.parquet.row.ParquetRowDataBuilder.<init>(ParquetRowDataBuilder.java:55) ~[flink-parquet_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.formats.parquet.row.ParquetRowDataBuilder$FlinkParquetBuilder.createWriter(ParquetRowDataBuilder.java:124) ~[flink-parquet_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.formats.parquet.ParquetWriterFactory.create(ParquetWriterFactory.java:56) ~[flink-parquet_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.table.filesystem.FileSystemTableSink$ProjectionBulkFactory.create(FileSystemTableSink.java:624) ~[flink-table-blink_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.api.functions.sink.filesystem.BulkBucketWriter.openNew(BulkBucketWriter.java:75) ~[flink-table-blink_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.api.functions.sink.filesystem.OutputStreamBasedPartFileWriter$OutputStreamBasedBucketWriter.openNewInProgressFile(OutputStreamBasedPartFileWriter.java:90) ~[flink-table-blink_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.api.functions.sink.filesystem.BulkBucketWriter.openNewInProgressFile(BulkBucketWriter.java:36) ~[flink-table-blink_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.api.functions.sink.filesystem.Bucket.rollPartFile(Bucket.java:243) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.api.functions.sink.filesystem.Bucket.write(Bucket.java:220) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.api.functions.sink.filesystem.Buckets.onElement(Buckets.java:305) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.api.functions.sink.filesystem.StreamingFileSinkHelper.onElement(StreamingFileSinkHelper.java:103) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.table.filesystem.stream.AbstractStreamingWriter.processElement(AbstractStreamingWriter.java:140) ~[flink-table-blink_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.pushToOperator(CopyingChainingOutput.java:71) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:46) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:26) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:50) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:28) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at StreamExecCalc$35.processElement(Unknown Source) ~[?:?]
at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.pushToOperator(CopyingChainingOutput.java:71) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:46) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:26) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:50) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:28) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.table.runtime.operators.source.InputConversionOperator.processElement(InputConversionOperator.java:128) ~[flink-table-blink_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.pushToOperator(CopyingChainingOutput.java:71) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:46) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:26) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:50) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:28) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.api.operators.StreamSourceContexts$ManualWatermarkContext.processAndCollectWithTimestamp(StreamSourceContexts.java:322) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.api.operators.StreamSourceContexts$WatermarkContext.collectWithTimestamp(StreamSourceContexts.java:426) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.connectors.kafka.internals.AbstractFetcher.emitRecordsWithTimestamps(AbstractFetcher.java:365) ~[flink-connector-kafka_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.connectors.kafka.internals.KafkaFetcher.partitionConsumerRecordsHandler(KafkaFetcher.java:183) ~[flink-connector-kafka_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.connectors.kafka.internals.KafkaFetcher.runFetchLoop(KafkaFetcher.java:142) ~[flink-connector-kafka_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumerBase.run(FlinkKafkaConsumerBase.java:826) ~[flink-connector-kafka_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:110) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:66) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.streaming.runtime.tasks.SourceStreamTask$LegacySourceFunctionThread.run(SourceStreamTask.java:269) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
2021-08-15 10:45:37,863 INFO org.apache.flink.runtime.resourcemanager.slotmanager.DeclarativeSlotManager [] - Clearing resource requirements of job e8f0af4bb984507ec9f69f07fa2df3d5
2021-08-15 10:45:37,865 INFO org.apache.flink.runtime.executiongraph.failover.flip1.RestartPipelinedRegionFailoverStrategy [] - Calculating tasks to restart to recover the failed task cbc357ccb763df2852fee8c4fc7d55f2_0.
2021-08-15 10:45:37,866 INFO org.apache.flink.runtime.executiongraph.failover.flip1.RestartPipelinedRegionFailoverStrategy [] - 1 tasks should be restarted to recover the failed task cbc357ccb763df2852fee8c4fc7d55f2_0.
2021-08-15 10:45:37,867 INFO org.apache.flink.runtime.executiongraph.ExecutionGraph
According to the guidelines given on the official website of Flink:
add the Flink parquet dependency package and parquet-hadoop-1.11.1.jar and parquet-common-1.11.1.jar packages. The above error still exists and the specified construction method cannot be found.
reason:
In CDH hive version: the version in parquet-hadoop-bundle.jar is inconsistent with that in Flink parquet.
**
resolvent:
**
1. Because the Flink itself has provided the Flink parquet package and contains the corresponding dependencies, it is only necessary to ensure that the dependencies provided by the Flink are preferentially loaded when the Flink task is executed. Flink parquet can be packaged and distributed with the code
2. Because the package versions are inconsistent, you can consider upgrading the corresponding component version. Note that you can’t simply adjust the version of parquet-hadoop-bundle.jar. After viewing it from Maven warehouse, there are no available packages to use. And: upgrade the version of hive or reduce the version of Flink.
When elasticsearch is installed, various errors are reported during startup. The summary is as follows:
Error 1
Java.lang.runtimeexception: can not run elasticsearch as root
solution: use a non root user to start es
Error report 2
max virtual memory areas vm.max_ map_ count [65530] is too low, increase to at least [262144]
Solution:
switch root user
VI / Etc/sysctl. Conf
add the last line
vm.max_ map_ Count = 655360
execute the command: sysctl – P
Error reporting 3
the default discovery settings are unsuitable for production use; at least one of [discovery.seed_ hosts, discovery.seed_ providers, cluster.initial_ master_ nodes] must be configured
Solution:
in the config directory of elasticsearch, modify the elasticsearch.yml configuration file and add the following configuration to the configuration file:
cluster.initial_ master_ nodes: [“node-1”]
Error reporting 4
Max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
the maximum number of files opened simultaneously in each process is too small. You can view the current number through the following two commands
ulimit -Hn ulimit -Sn
Switch the root user, modify the/etc/security/limits.conf file, add the configuration, and log in again after the user exits
* soft nofile 65536 * hard nofile 65536
Error reporting 5
max number of threads [3818] for user [es] is too low, increase to at least [4096]
The problem is the same as above. The maximum number of threads is too low. Modify the configuration file/etc/security/limits.conf (and question 4 is a file) and add the configuration
* soft nproc 4096 * hard nproc 4096
It can be viewed through the command
ulimit -Hu ulimit -Su
Modified file:
This error occurs when packaging with postcss: Invalid options object. PostCSS Loader has been initialized using an options object that does not match the API schema.
I’ve been searching for information for a long time because the versions are incompatible,
Solution: create a new postcss.config.js file under the root directory
The file configuration is as follows
module.exports={
plugins:[
require("postcss-preset-env")
]
}Then delete the options in webpack.config.js and package again.
oracleasm createdisk OCRDISK1 /dev/sdb1
oracleasm createdisk OCRDISK1 /dev/sdb1
NPM installation
npm i yungouos-pay-uniapp-sdk
Error reporting
solution:
find the installation directory of nodejs, right-click the attribute
set users to fully control users
OK!
Rsync client synchronization error
Error reason: the password is entered correctly but cannot be synchronized
Solution: because the permission of the account password file on the server is not 600, you need to set the permission to 600 to synchronize it
Project scenario:
in hexo + GitHub blog deployment, set up and register GitHub account and create warehouse in nodejs and git environment, and then start to set up blog
If hexo is working properly, enter http://localhost:4000/ You can see the initial appearance of the blog 
Problem Description:
after installing the local environment and using git bash in windows, the hexo init command cannot be executed, and the following error is reported: </ font>
bash: hexo: command not found
Cause analysis:
it may be that the NPM environment of node is not well configured. You can try to reinstall node and install it in the default path, or it may not be completely installed when installing with git bash
Solution:
method 1: select the folder where you downloaded the note.js, right-click to open it with git bash, and then enter the command
method 2: open the previously created folder (your blog, mine is blog), hold down shift, right-click, select PowerShell option, open the command prompt, and enter the following command:
after that, a new folder blog will be generated in your folder, which is the content to be deployed
After entering NPX hexo server, you can see that a section of address appears: http://localhost:4000 , you can preview it by typing in your browser
Note: it is recommended to use method 1, because if you use method 2 to deploy successfully, you should use NPX command when writing articles later!!!
Mindspot rewrites withlosscell, traionestepcell interface
Error: runtimeerror:_kernel.cc:88 CheckParam] AddN output shape must be equal to input shape.Trace: In file add_impl.py(272)/ return F.addn((x, y))/
Solution: do not return multiple parameters in the construct method of withlosscell, otherwise an error will be reported in the gradoperation in the construct of traionestepcell.
As the machine moved, IP was replaced. When you encounter some problems during restarting JIRA, record the key points and solutions.
Key points:
check the database configuration
/var/atlas/application data/JIRA/dbconfig. XML
since LDAP authentication is used, you also need to check the user group authentication configuration
find CWD in the database_ directory_ Attribute table, check the configuration with the attribute name ldap.url
Problems and solutions:
JIRA startup failed, JIRA has been locked.
******************************************
JIRA startup failed
unable to create and acquire lock file for jira.home directory ‘/ var/atlas/application data/JIRA… I don’t remember later
solution: delete the. Jira-home.lock (hidden file) under the corresponding directory prompted, enter the bin directory and restart the JIRA service
>>>>>
then an error is reported:
JIRA startup failed
unable to clean the cache directory:/var/atlas/application data/JIRA/plugins /. OSGi plugins/Felix
Check the startup log:
caused by: java.io.ioexception: unable to delete file:/var/atlas/application data/JIRA/plugins /. OSGi plugins/Felix/Felix cache/bundle163/bundle. State
solution: delete the. OSGi plugins folder (hidden folder) in the prompt directory and restart JIRA service
At this time, the original error page will become startup seccused and can be used normally
./startup.sh and./shutdown.sh are recommended for restarting the JIRA service