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Bug #1136

closed

Saved session generated from lttng 2.8 fail to load on lttng 2.10

Added by Jonathan Rajotte Julien over 6 years ago. Updated almost 6 years ago.

Status:
Resolved
Priority:
Normal
Assignee:
-
Target version:
-
Start date:
11/11/2017
Due date:
% Done:

0%

Estimated time:

Description

The following session cannot be loaded and result in the following on lttng load:

Error: Failed to load session saved_trace: Unknown error code
Error: Unknown error code
Error: Command error

After performing some debugging it seems that the error is introduced by cf0bcb51ea857687a353d2851e572dba6cc63cb0.

lttng_channel_create, which was introduced does not seems to support all type of domain. It support only LTTNG_DOMAIN_UST, LTTNG_DOMAIN_KERNEL while the passed value can also be LTTNG_DOMAIN_JUL, LTTNG_DOMAIN_PYTHON, LTTNG_DOMAIN_LOG4J.

This is not triggered by testing since no channels are under those domains in the session files used.

<?xml version="1.0" encoding="UTF-8"?>
<sessions>
    <session>
        <name>saved_trace</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>
                    <channel>
                        <name>lttng_jul_channel</name>
                        <enabled>true</enabled>
                        <overwrite_mode>DISCARD</overwrite_mode>
                        <subbuffer_size>131072</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>hello</name>
                                <enabled>true</enabled>
                                <type>TRACEPOINT</type>
                                <loglevel_type>ALL</loglevel_type>
                                <filter>logger_name == &quot;hello&quot;</filter>
                            </event>
                        </events>
                        <contexts>
                            <context>
                                <app>
                                    <provider_name>myRetriever</provider_name>
                                    <ctx_name>intCtx</ctx_name>
                                </app>
                            </context>
                        </contexts>
                    </channel>
                </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>131072</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>hello</name>
                                <enabled>true</enabled>
                                <type>TRACEPOINT</type>
                                <loglevel_type>ALL</loglevel_type>
                                <filter>logger_name == &quot;hello&quot;</filter>
                            </event>
                        </events>
                        <contexts>
                            <context>
                                <app>
                                    <provider_name>myRetriever</provider_name>
                                    <ctx_name>intCtx</ctx_name>
                                </app>
                            </context>
                        </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>/tmp/lttng-ivc-w6cdmm16/lttng-traces/saved_trace-20171111-164756</path>
                </destination>
            </consumer_output>
        </output>
    </session>
</sessions>
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