I'm trying to use canplayer to replay some candump files, with no success. When I try to run the canplayer it just executes and returns, giving me no clue of what is happening.
What I've tried up to now:
Setup 1
Set up a vcan interface
Sent data to the vcan interface using cansend and cangen, with success (verified with candump).
Recorded a candump file from vcan0 when running cangen. Recorded files with absolute timestamps (-t a) and without.
Tried using canplayer to reproduce the file. Tried using several arguments, no avail. canplayer just returns immediately without any complaint. If I mess up the the file or arguments it complains.
Setup 2
Connected 2 PEAK CAN USB adapter devices to the PC.
Connected the adapters to each other using a 120ohm terminated cable
Started cangen pointing to can0 and verified that the messages got to can1 using candump
Recorded candump files from can0 interface.
Tried using canplayer to reproduce the file., with no success.
I've tried these tests on two different machines, both running Ubuntu 12.04, with the same results.
Do you know what might be the cause of it?
It seems I had recorded the log files in a wrong manner.
My logs files where recording using the following command:
$ candump -ta vcan0 "log.candump"
That command, however, records the log in human readable format:
vcan0 1B3 [8] 8E 02 74 22 55 70 49 30
vcan0 658 [6] 27 48 2C 56 14 0A
vcan0 1F8 [2] 77 99
vcan0 7B7 [8] 33 A2 24 38 B2 78 86 72
vcan0 43C [8] 92 C6 81 2E FC 5E 38 35
vcan0 7B0 [2] 2D 1B
In order to record log files that can be playback with canplayer, they should be recorded using either
$ candump -l vcan0
or
$ candump -L vcan0 > myfile.log
The recorded file will look like this:
(1436509052.249713) vcan0 044#2A366C2BBA
(1436509052.449847) vcan0 0F6#7ADFE07BD2
(1436509052.650004) vcan0 236#C3406B09F4C88036
(1436509052.850131) vcan0 6F1#98508676A32734
(1436509053.050284) vcan0 17F#C7
(1436509053.250417) vcan0 25B#6EAAC56C77D15E27
(1436509053.450557) vcan0 56E#46F02E79A2B28C7C
(1436509053.650713) vcan0 19E#6FE1CB7DE2218456
(1436509053.850870) vcan0 1A0#9C20407F96EA167B
(1436509054.051025) vcan0 6DE#68FF147114D1
Files in that format can be replayed in canplayer using the following commands:
$ canplayer -I candump-2015-07-10_081824.log
or
$ cat candump-2015-07-10_081824.log | canplayer
Credits for this answer go to Oliver Hartkopp.
I found this article with some great information about using can and vcan. After taking a log of a physical CAN bus with candump using
$ candump -l can0
as stated in the previous answer. I used the following to play it back over a virtual CAN bus.
$ canplayer vcan0=can0 -I candump-may-14-2015.log
Related
I am getting the following error while running my Ruby on rails 6 app on locale (Ubuntu 18.04 using chrome):
Uncaught (CardanoSerializationLib.ts:15 in promise) CompileError: WebAssembly.instantiate(): expected magic word 00 61 73 6d, found 3c 21 44 4f #+0
and
GET http://localhost:3000/wasm/csl-v10.0.4.wasm 404 (Not Found)
and
`WebAssembly.instantiateStreaming` failed because your server does not serve wasm with `application/wasm` MIME type. Falling back to `WebAssembly.instantiate` which is slower. Original error:
TypeError: Failed to execute 'compile' on 'WebAssembly': HTTP status code is not ok
Seems like it is affecting webpacker, and cannot render my pages.
Looks like disabling Eternl wallet extension might be a temp fix while the team looks into it:
https://github.com/ccwalletio/tracker/issues/119
Ever since I downloaded Xcode 13 I have been unable to see the quick help window (option click) for objects/functions/variables I have created.
I can see the quick help window for other swift frameworks (option clicking tableView works, for example). Just not for my own.
I have tried
running this in command line:
$ defaults delete com.apple.dt.Xcode WebKitJavaScriptEnabled
deleting this:
~/Library/Caches/com.apple.dt.Xcode
running this:
$ defaults delete com.apple.dt.Xcode IDEIndexDisable
This is what I see when I run:
$ cd ~/Library/Developer/Xcode/DocumentationCache/
$ ls -al
total 0
drwxr-xr-x 4 myname staff 128 Sep 21 13:13 .
drwxr-xr-x 13 myname staff 416 Sep 24 20:38 ..
drwxr-xr-x 3 myname staff 96 Apr 28 10:49 v187
drwxr-xr-x 3 myname staff 96 Sep 21 13:13 v202
Anyone know of any fixes?
A restart of the machine solved the issue for me. Xcode then installed components and built the quick help for Apple's documentation and the documentation in my own code.
I have some example Avro messages from a kafka provider that looks to start as such:
00000000 4f 62 6a 01 04 16 61 76 72 6f 2e 73 63 68 65 6d |Obj...avro.schem|
00000010 61 ef bf bd 24 7b 22 74 79 70 65 22 3a 22 72 65 |a...${"type":"re|
That ef bf bd 24 I expected to be the length of the schema which is 2332 bytes. I'm having trouble confirming that the zigzag varint (why would a length, which can never be negative, be zigzaged?) is the right value. I take it to be somewhere in the 200K range.
I believe that's why I'm having trouble using the avro-tools jar on it at all to either getmeta, getschema or transform to json.
Is this a particular known issue with either the version of Avro Tools which is 1.8.2 or the platform Mac OS with java 1.8.0_102-b14 for that tool version?
Does this look like it's been mis-encoded? Because all calls to use the tools give me:
$ java -jar ~/Downloads/avro-tools-1.8.2.jar tojson dt20170607hr08_1496793109907_11_8229967.bin.1
log4j:WARN No appenders could be found for logger (org.apache.hadoop.metrics2.lib.MutableMetricsFactory).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
Exception in thread "main" java.lang.IllegalArgumentException
at java.nio.ByteBuffer.allocate(ByteBuffer.java:334)
at org.apache.avro.io.BinaryDecoder.readBytes(BinaryDecoder.java:288)
at org.apache.avro.file.DataFileStream.initialize(DataFileStream.java:112)
at org.apache.avro.file.DataFileStream.<init>(DataFileStream.java:84)
at org.apache.avro.tool.DataFileReadTool.run(DataFileReadTool.java:71)
at org.apache.avro.tool.Main.run(Main.java:87)
at org.apache.avro.tool.Main.main(Main.java:76)
Looks like you have a single record in the Avro file. The system generating the Avro file is running the older version. I have a similar issue with Nifi running 1.7.7. By merging two records into the Avro file, we were able to work around the issue.
Avro 1.8.2 fixes the bug.
1.7.7 and 1.8.0/1.8.1 all have the single record issue.
https://issues.apache.org/jira/browse/AVRO-1888
I have the log below trying to parse it by the indicated column number 1 as Date, 2 as Time, 3 as Task, 4 as Error_Line, and 5 all the rest columns as Error_Message
|1 | |2 | |3 | |4 | |5 |
09-15-16 05:23:45 B:VVBN 09064 Port 22 Device 10400 Remote 44 13331 Link Up RP2016
09-15-16 05:23:44 A:QAWE 09064 Port 22 Device 10400 Remote 44 13331 Link Up RP2016
09-15-16 05:23:44 B:VVBN 13425 Port 22 Device 10400 Remote 44 13331 Receive Time Error: 24666 23270 1396 69
09-15-16 05:23:43 B:QAWE 13372 Port 22 Device 10400 Remote 44 13331 Send Time Error: 444 1888 1444 69
09-15-16 05:23:43 A:VVBN 13425 Port 22 Device 10400 Remote 44 13331 Receive Time Error: 24666 23270 1396 69
09-15-16 05:23:43 A:CCBE 13372 Port 22 Device 10400 Remote 44 13331 Send Time Error: 444 1888 1444 69
09-15-16 05:21:56 B:VVBN 07270 Port 22 Device 10400 Remote 44 13331 AT Timer Expired
09-15-16 05:21:56 A:CCBE 07270 Port 22 Device 10400 Remote 44 13331 AT Timer Expired
here is my script
logs = LOAD '/data/test_log.txt' USING PigStorge(' ') AS (date: chararray, time: chararray, task: chararray, line_error: int, error_message: chararray);
date = GROUP logs BY date;
counts = FOREACH date GENERATE COUNT($4) as count;
DUMP counts;
notice there is one space between columns only there is five spaces between 3 and 4 columns.
I tried the script above but it just work good for date not for last column Error_message.
I am trying to get this output bag:
(09-15-16,05:23:45,B:VVBN,09064,Port 22 Device 10400 Remote 44 13331 Link Up RP2016)
(09-15-16,05:23:44,A:QAWE,09064,Port 22 Device 10400 Remote 44 13331 Link Up RP2016)
:
:
I just need to consider the first four columns any other columns in the log file mix them in one column 5.
Any suggestion to get the desired output.
You need to use MyRegExLoader provided by piggybank to process custom log files.
logs = LOAD '/data/test_log.txt' USING org.apache.pig.piggybank.storage.MyRegExLoader ('provide the regex ');
I'm trying to use Bosun to determine if certain processes are running and then eventually alert on if they are up or down. I'm probably misinterpreting the docs but I can't figure this out.
Bosun is running just fine. I have the scollector running on Ubuntu 14 LTS and using my config file correctly.
Here is what I have in my scollector.toml:
host="blah:8070"
hostname="cass01"
[[Process]]
command = "^.*(java).*(CassandraDaemon)$"
name = "Cassandra"
I would then expect to see in bosun under my host cass01 a metric title "cassandra" somewhere but it's nowhere to be seen. Other metrics are there.
Right now Command is a partial match on the process path to the binary, up to the first space delimiter. The Args parameter is a regex to differentiate between multiple instances of the process. So for a java process you would use something like:
[[Process]]
Command = "java"
Name = "Cassandra"
Args = "CassandraDaemon$"
This would match a command line like:
/usr/bin/java /usr/bin/CassandraDaemon
This assumes the /proc/<pid>/cmdline for that process ends in CassandraDaemon. If it doesn't end in that string you would need to change the Args to just "CassandraDaemon" which would match any java process that contains that string.
Also some processes change the cmdline to something other than a nul delimited string. In those cases the Command argument needs to be used to match as Args is expecting nul delimiters. Example:
cat /proc/80156/cmdline | hexdump -C
00000000 2f 75 73 72 2f 62 69 6e 2f 72 65 64 69 73 2d 73 |/usr/bin/redis-s|
00000010 65 72 76 65 72 20 2a 3a 36 33 37 39 00 00 00 00 |erver *:6379....|
00000020 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00000030 00 |.|
00000031
#Example for cmdline without NUL (00) delimiters between args
[[Process]]
Command = "redis-server *:6379"
Name = "redis-core"
Once these are in place with the correct matching values you should see metrics show up under linux.proc.* where the the name tag will match the name used in the TOML file.