In java you could use System.out.println() to print a blank line but how does it work with log4j in a logfile?
There I also want to have one or more blank lines inside the logfile.
I already read the follwing:
log4j how to append blank line
But this is not really helpful because with
logger.debug("\n");
logger.debug("");
you do not print a message but other information like time and so on (the layout of the logger) are still stored inside the logfile. But I just want to have a total empty line.
Can anyone help me please?
Log4j is not designed to write blank lines.
You cannot find this option in the logger, because the logger is independent of his appenders who write to a file or the console or something different.
I think you need to create your custom FileAppender which checks the Logging Message before the writing. If your message.equals("\n"); you append a blank line without the layout by accessing the file by your own and skip the normal logging with the layout. then you can use Logger.debug("\n");
Also it is a bad practice to add blank lines. It is similar to split your Log-Message over several lines. Your want all your Logmessage in one line each, so they are easy to parse for LogViewer-Tools like chainsaw or OtrosLogViewer One exception are Stacktraces.
Create your own appender with empty layout and a logger that uses that appender. Then write the blank line using that logger. Make certain to set the additivity attribute for logger to false so that the root logger doesn't write the message using the formatting of its appenders.
Related
I am looking for a way of reading property file in logstash config file so that I can do some data transformation based on the property file value? for example I can skip processing type 1 event and send to index a, process type 2 events and sent to index 2.
If I understand your question correctly, note that logstash will read all the files in your config directory. You can put different processing blocks in different config files, which makes for a nice separation of code. Be sure that each block is wrapped in a conditional so that they don't all run for all events.
I have to log in different-2 file. So I have created two appender. One for basic log which would log little bit information.
Second appender will be dynamic and depending on the one parameter log file name will be different. Both scenario are working fine.
Now just found the log statement are getting added.
Means first time it write once, second time tow lines and third time three and so on.. My program runs on every 20 seconds. If I close the program and run again it will not repeat but if continuous runs every 20 second then it start repeat log.
I have used log4j.Create to logger and adding appender in this. Every thing I am doing by code. Not using any log file. Below is one of them.
static Logger loggerCustom = Logger.getLogger("CustomLog");
PatternLayout plt = new PatternLayout();
plt.setConversionPattern("%-7p %d [%t] %c %x - %m%n");
fh = new FileAppender(plt, "logs\\" + strDate + "\\CustomLog.log");
loggerCustom.addAppender(fh);
loggerCustom.setAdditivity(false);
Dear All above issue has been resolve by adding below line before appending appender.
.removeAllAppenders()
I have a custom log file that has plain text as well as xml tags. How do i capture these in separate fields. Here is how it looks like:
1/10/2017 4:16:35 AM :
Error thrown is:
No Error
Request sent is:
SCEO415154712
Response received is:
SCEO4151547trueTBAfalse7169-1TBAfalse2389-1
1/10/2017 4:16:35 AM :
Error thrown is:
No Error
*************************************************************************
Request sent is:
<InventoryMgmtRequest xmlns="http://www.af.com/Ecommerce/Worldwide/AvailabilityService/Schemas/InventoryMgmtRequest"><ns0:MsgHeader MessageType="FIXORD" MsgDate="10.01.2017 04:16:32" SystemOfOrigin="ISCS_DE" CommunityID="SG888" xmlns:ns0="http://www.av.com/Ecommerce/Worldwide/AvailabilityService/Schemas/InventoryMgmtRequest"><ns0:OrderID>SCEO4151547</ns0:OrderID><ns0:ReservationID></ns0:ReservationID><ns0:CRD></ns0:CRD></ns0:MsgHeader><ns0:MsgBody xmlns:ns0="http://www.ab.com/Ecommerce/Worldwide/AvailabilityService/Schemas/InventoryMgmtRequest"><ns0:Product Sku="CH562EE" Qty="1" IsExpress="false" IsTangible="true" Region="EMEA" Country="DE"><ns0:ProdType></ns0:ProdType><ns0:LineItemNum>1</ns0:LineItemNum><ns0:JCID></ns0:JCID></ns0:Product><ns0:Product Sku="CH563EE" Qty="1" IsExpress="false" IsTangible="true" Region="EMEA" Country="DE"><ns0:ProdType></ns0:ProdType><ns0:LineItemNum>2</ns0:LineItemNum><ns0:JCID></ns0:JCID></ns0:Product></ns0:MsgBody></InventoryMgmtRequest>
*************************************************************************
Response received is:
<ns0:InventoryMgmtResponse xmlns:ns0="http://www.ad.com/Ecommerce/Worldwide/AvailabilityService/Schemas/InventoryMgmtResponse"><ns0:MsgHeader MsgDate="10.01.2017 04:16:32" MessageType="FIXORD"><ns0:OrderID>SCEO4151547</ns0:OrderID><ns0:ReservationID /><ns0:ReadyToRelease>true</ns0:ReadyToRelease></ns0:MsgHeader><ns0:MsgBody><ns0:Product SKU="CH562EE" LSPSKU="9432GFT" OutOfStock="false" FulfillmentSite="00ZF" SKUExist="true" Region="EMEA" Country="DE" IsTangible="true"><ns0:EDD>TBA</ns0:EDD><ns0:FutureUsed>false</ns0:FutureUsed><ns0:CurrentQty>7169</ns0:CurrentQty><ns0:FutureQty>-1</ns0:FutureQty></ns0:Product><ns0:Product SKU="CH563EE" LSPSKU="9432GFU" OutOfStock="false" FulfillmentSite="00ZF" SKUExist="true" Region="EMEA" Country="DE" IsTangible="true"><ns0:EDD>TBA</ns0:EDD><ns0:FutureUsed>false</ns0:FutureUsed><ns0:CurrentQty>2389</ns0:CurrentQty><ns0:FutureQty>-1</ns0:FutureQty></ns0:Product></ns0:MsgBody></ns0:InventoryMgmtResponse>
*************************************************************************
Also I don't want to capture the line separators (line full of **** at the end) in my grok fields.
There is no simple answer here I'm afraid. Logstash and other log processing tools works line by line, each line is an event. If your events span more than one line you can use the multiline codec, which is pretty powerful, but in my experience you are better off trying to get the logs on to single lines at source, this makes it so much easier to write a pattern and get the process working reliably.
The issues you have here are many, but if, for example, one of your messages (sent via TCP) is retransmitted for some reason or simply (sent via UDP) lost, your pattern will break as part of the message that logstash is expecting is not there.
The best thing you can do in my opinion is to try and change the logging process to save to a file as a single line per event. Most logging tools should allow this with the right config options. Ideally, get your application to log in json format, (assuming you're processing logs to save them in elasticsearch) this would involve the lowest overhead on the logstash server to process these logs (as elasticsearch saves them in json format). All you would then need to do is pass each event/log line to the json filter and the fields are generated by the names given to it by your application.
I have a PowerShell script that uses log4Net for the management of logs. The logs are written in log files and in MS SQL database. The script is using multi-threading with run spaces.
The issue is multiple threads are managing several objects and logging lots of data on different objects at the same time. And I need to regroup logs by object. An example will help me to explain myself better! ^^
log file line 1 OBJECT 1.ACTION 1
log file line 2 OBJECT 1.ACTION 2
log file line 3 OBJECT 1.ACTION 3
log file line 4 object2.action1
log file line 5 object3.action1
log file line 6 OBJECT 1.ACTION 4
log file line 7 object2.action2
log file line 8 OBJECT 1.ACTION 5
…
To manage this intercalated logging issue, I planned to log in memory, for example in a table, and at the end of the treatment of the objects; block other threads using mutex and write all logs with a foreach loop.
Main {
Treat object {
Action1 -> Logs +=log1
Action2 -> Logs +=log2
…
}
System.Threading.Mutex WaitOne()
For each ($log in $Logs) {
Write in log file
Write in SQL DB
}
System.Threading.Mutex ReleaseMutex()
}
I would like to know if there is any better solution to manage intercalated logging issue with multiple run spaces please.
Log4Net can perhaps natively manage this; stocks all logs in memory and “commits” the writes only when I type a command? Or some other solutions without using Mutex?
One way would be to use one logger per group, and if you don't know the number of groups in advance you could just create the loggers dynamically.
If you prefer to work with one logger, the best practice usually is to log things as they happen and do the grouping afterwards, for example when the logs are displayed.
It's trivial to do in SQL by adding a column for the grouping criteria, or for a text file you could use the unix sort command.
I am logging data to Splunk via log4j and a SyslogAppender. Sometimes the information shows up in Splunk with ellipsis (...) instead of the actual text with some odd spacing. When I log the same event to a RollingFileAppender, it logs normally. Would anyone know why this is happening and how to resolve it?
Thank you!
Example:
InboundTxnDate: 20130926 16:53:14:475
Out...
...boundTxnTypeCode: UNK
This is how syslog appenders work, they split log message, if it is bigger than 1019 bytes. When log message is split, this message will end with ellipsis and next message starts with ellipsis. Limit of message (1019 bytes) is hardcoded and cannot be changed by no configuration in log4j. Look at RFC 3164 and see source code of SyslogAppender
Would anyone know why this is happening
Ondřej Benkovský answered that very well and I have nothing to add.
how to resolve it?
If the split lines are part of the same event in Splunk, you can join them by editing $SPLUNK_HOME/etc/system/local/props.conf and adding a stanza like this:
[<spec>]
SEDCMD-join_log4j_syslog_lines=s/\.\.\.[\r\n]+\.\.\.//g
That will join the lines at index time and remove the ellipses.
Note that you'll need to change <spec> as detailed in the document for props.conf.
You can use the regex search command to make sure it's working:
| regex "\.\.\.[\r\n]+\.\.\."