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Bug #1124
openlttng-sessiond saves empty domain stubs
Start date:
07/24/2017
Due date:
% Done:
0%
Estimated time:
Description
The save command, when used to save a session containing a single log4j event and channel, produces empty stubs for all userspace domains.
<?xml version="1.0" encoding="UTF-8"?> <sessions> <session> <name>test</name> <domains> <domain> <type>UST</type> <buffer_type>PER_UID</buffer_type> <channels/> <trackers/> </domain> <domain> <type>JUL</type> <buffer_type>PER_UID</buffer_type> <channels/> </domain> <domain> <type>LOG4J</type> <buffer_type>PER_UID</buffer_type> <channels> <channel> <name>lttng_log4j_channel</name> <enabled>true</enabled> <overwrite_mode>DISCARD</overwrite_mode> <subbuffer_size>524288</subbuffer_size> <subbuffer_count>4</subbuffer_count> <switch_timer_interval>0</switch_timer_interval> <read_timer_interval>0</read_timer_interval> <output_type>MMAP</output_type> <tracefile_size>0</tracefile_size> <tracefile_count>0</tracefile_count> <live_timer_interval>0</live_timer_interval> <events> <event> <name>dfklasj</name> <enabled>true</enabled> <type>TRACEPOINT</type> <loglevel_type>ALL</loglevel_type> <filter>logger_name == "dfklasj"</filter> </event> </events> <contexts/> </channel> </channels> </domain> <domain> <type>PYTHON</type> <buffer_type>PER_UID</buffer_type> <channels/> </domain> </domains> <started>false</started> <output> <consumer_output> <enabled>true</enabled> <destination> <path>/home/jgalar/lttng-traces/test-20170724-142342</path> </destination> </consumer_output> </output> </session> </sessions>
Reproduction steps:
$ lttng create test Session test created. Traces will be written in /home/jgalar/lttng-traces/test-20170724-142342 $ lttng enable-channel -u lttng_log4j_channel --monitor-timer 456789 UST channel lttng_log4j_channel enabled for session test $ lttng enable-event -l dfklasj LOG4J event dfklasj enabled $ lttng list test Tracing session test: [inactive] Trace path: /home/jgalar/lttng-traces/test-20170724-142342 === Domain: UST global === Buffer type: per UID Channels: ------------- - lttng_log4j_channel: [enabled] Attributes: overwrite mode: 0 subbuffers size: 524288 number of subbuffers: 4 switch timer interval: 0 read timer interval: 0 monitor timer interval: 456789 trace file count: 0 trace file size (bytes): 0 discarded events: 0 lost packets: 0 output: mmap() Events: None === Domain: LOG4j (Logging for Java) === Events (Logger name): --------------------- - dfklasj [enabled] [filter: 'logger_name == "dfklasj"'] $ lttng save All sessions have been saved successfully.
Updated by Jonathan Rajotte Julien about 7 years ago
- Status changed from Confirmed to Feedback
- Priority changed from Normal to Low
- Target version changed from 2.10 to Wishlist
As discussed via IRC
Looking at the code, this is by design. No regression here.
Still we could refactor this code to perform group by domain type for channels and only print domain where the channel count is not zero. This would prevent the iteration over all ust channels for each time we print a domain.
Cheers
Updated by Jonathan Rajotte Julien about 7 years ago
- Target version changed from Wishlist to Refactoring
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