/usr/share/pyshared/mrjob/tools/emr/fetch_logs.py is in python-mrjob 0.3.3.2-1.
This file is owned by root:root, with mode 0o644.
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#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""List, display, and parse Hadoop logs associated with EMR job flows. Useful
for debugging failed jobs for which mrjob did not display a useful error
message or for inspecting jobs whose output has been lost.
Usage::
python -m mrjob.tools.emr.fetch_logs -[l|L|a|A|--counters] [-s STEP_NUM]\
JOB_FLOW_ID
Options::
-a, --cat Cat log files MRJob finds relevant
-A, --cat-all Cat all log files to JOB_FLOW_ID/
-c CONF_PATH, --conf-path=CONF_PATH
Path to alternate mrjob.conf file to read from
--counters Show counters from the job flow
--ec2-key-pair-file=EC2_KEY_PAIR_FILE
Path to file containing SSH key for EMR
-h, --help show this help message and exit
-l, --list List log files MRJob finds relevant
-L, --list-all List all log files
--no-conf Don't load mrjob.conf even if it's available
-q, --quiet Don't print anything to stderr
-s STEP_NUM, --step-num=STEP_NUM
Limit results to a single step. To be used with --list
and --cat.
-v, --verbose print more messages to stderr
"""
from __future__ import with_statement
from optparse import OptionError
from optparse import OptionParser
import sys
from mrjob.emr import EMRJobRunner
from mrjob.emr import LogFetchError
from mrjob.job import MRJob
from mrjob.logparsers import TASK_ATTEMPT_LOGS
from mrjob.logparsers import STEP_LOGS
from mrjob.logparsers import JOB_LOGS
from mrjob.logparsers import NODE_LOGS
from mrjob.util import scrape_options_into_new_groups
def main():
option_parser = make_option_parser()
try:
options = parse_args(option_parser)
except OptionError:
option_parser.error('This tool takes exactly one argument.')
MRJob.set_up_logging(quiet=options.quiet, verbose=options.verbose)
with EMRJobRunner(**runner_kwargs(options)) as runner:
perform_actions(options, runner)
def perform_actions(options, runner):
"""Given the command line arguments and an :py:class:`EMRJobRunner`,
perform various actions for this tool.
"""
if options.step_num:
step_nums = [options.step_num]
else:
step_nums = None
if options.list_relevant:
list_relevant(runner, step_nums)
if options.list_all:
list_all(runner)
if options.cat_relevant:
cat_relevant(runner, step_nums)
if options.cat_all:
cat_all(runner)
if options.get_counters:
desc = runner._describe_jobflow()
runner._set_s3_job_log_uri(desc)
runner._fetch_counters(
xrange(1, len(desc.steps) + 1), skip_s3_wait=True)
runner.print_counters()
if options.find_failure:
find_failure(runner, options.step_num)
def parse_args(option_parser):
option_parser = make_option_parser()
options, args = option_parser.parse_args()
# should be one argument, the job flow ID
if len(args) != 1:
raise OptionError('Must supply one positional argument as the job'
' flow ID', option_parser)
options.emr_job_flow_id = args[0]
return options
def runner_kwargs(options):
"""Given the command line options, return the arguments to
:py:class:`EMRJobRunner`
"""
kwargs = options.__dict__.copy()
for unused_arg in ('quiet', 'verbose', 'list_relevant', 'list_all',
'cat_relevant', 'cat_all', 'get_counters', 'step_num',
'find_failure'):
del kwargs[unused_arg]
return kwargs
def make_option_parser():
usage = 'usage: %prog [options] JOB_FLOW_ID'
description = (
'List, display, and parse Hadoop logs associated with EMR job flows.'
' Useful for debugging failed jobs for which mrjob did not display a'
' useful error message or for inspecting jobs whose output has been'
' lost.')
option_parser = OptionParser(usage=usage, description=description)
option_parser.add_option('-f', '--find-failure', dest='find_failure',
action='store_true', default=False,
help=('Search the logs for information about why'
' the job failed'))
option_parser.add_option('-l', '--list', dest='list_relevant',
action="store_true", default=False,
help='List log files MRJob finds relevant')
option_parser.add_option('-L', '--list-all', dest='list_all',
action="store_true", default=False,
help='List all log files')
option_parser.add_option('-a', '--cat', dest='cat_relevant',
action="store_true", default=False,
help='Cat log files MRJob finds relevant')
option_parser.add_option('-A', '--cat-all', dest='cat_all',
action="store_true", default=False,
help='Cat all log files to JOB_FLOW_ID/')
option_parser.add_option('-s', '--step-num', dest='step_num',
action='store', type='int', default=None,
help=('Limit results to a single step. To be used'
' with --list and --cat.'))
option_parser.add_option('--counters', dest='get_counters',
action='store_true', default=False,
help='Show counters from the job flow')
assignments = {
option_parser: ('conf_path', 'quiet', 'verbose',
'ec2_key_pair_file')
}
mr_job = MRJob()
job_option_groups = (mr_job.option_parser, mr_job.mux_opt_group,
mr_job.proto_opt_group, mr_job.runner_opt_group,
mr_job.hadoop_emr_opt_group, mr_job.emr_opt_group,
mr_job.hadoop_opts_opt_group)
scrape_options_into_new_groups(job_option_groups, assignments)
return option_parser
def prettyprint_paths(paths):
for path in paths:
print path
print
def _prettyprint_relevant(log_type_to_uri_list):
print 'Task attempts:'
prettyprint_paths(log_type_to_uri_list[TASK_ATTEMPT_LOGS])
print 'Steps:'
prettyprint_paths(log_type_to_uri_list[STEP_LOGS])
print 'Jobs:'
prettyprint_paths(log_type_to_uri_list[JOB_LOGS])
print 'Nodes:'
prettyprint_paths(log_type_to_uri_list[NODE_LOGS])
def list_relevant(runner, step_nums):
try:
logs = {
TASK_ATTEMPT_LOGS: runner.ls_task_attempt_logs_ssh(step_nums),
STEP_LOGS: runner.ls_step_logs_ssh(step_nums),
JOB_LOGS: runner.ls_job_logs_ssh(step_nums),
NODE_LOGS: runner.ls_node_logs_ssh(),
}
_prettyprint_relevant(logs)
except LogFetchError, e:
print 'SSH error:', e
logs = {
TASK_ATTEMPT_LOGS: runner.ls_task_attempt_logs_s3(step_nums),
STEP_LOGS: runner.ls_step_logs_s3(step_nums),
JOB_LOGS: runner.ls_job_logs_s3(step_nums),
NODE_LOGS: runner.ls_node_logs_s3(),
}
_prettyprint_relevant(logs)
def list_all(runner):
try:
prettyprint_paths(runner.ls_all_logs_ssh())
except LogFetchError, e:
print 'SSH error:', e
prettyprint_paths(runner.ls_all_logs_s3())
def cat_from_list(runner, path_list):
for path in path_list:
print '===', path, '==='
for line in runner.cat(path):
print line.rstrip()
print
def _cat_from_relevant(runner, log_type_to_uri_list):
print 'Task attempts:'
cat_from_list(runner, log_type_to_uri_list[TASK_ATTEMPT_LOGS])
print 'Steps:'
cat_from_list(runner, log_type_to_uri_list[STEP_LOGS])
print 'Jobs:'
cat_from_list(runner, log_type_to_uri_list[JOB_LOGS])
print 'Slaves:'
cat_from_list(runner, log_type_to_uri_list[NODE_LOGS])
def cat_relevant(runner, step_nums):
try:
logs = {
TASK_ATTEMPT_LOGS: runner.ls_task_attempt_logs_ssh(step_nums),
STEP_LOGS: runner.ls_step_logs_ssh(step_nums),
JOB_LOGS: runner.ls_job_logs_ssh(step_nums),
NODE_LOGS: runner.ls_node_logs_ssh(),
}
_cat_from_relevant(runner, logs)
except LogFetchError, e:
print 'SSH error:', e
logs = {
TASK_ATTEMPT_LOGS: runner.ls_task_attempt_logs_s3(step_nums),
STEP_LOGS: runner.ls_step_logs_s3(step_nums),
JOB_LOGS: runner.ls_job_logs_s3(step_nums),
NODE_LOGS: runner.ls_node_logs_s3(),
}
_cat_from_relevant(runner, logs)
def cat_all(runner):
try:
cat_from_list(runner, runner.ls_all_logs_ssh())
except LogFetchError, e:
print 'SSH error:', e
cat_from_list(runner, runner.ls_all_logs_s3())
def find_failure(runner, step_num):
if step_num:
step_nums = [step_num]
else:
job_flow = runner._describe_jobflow()
if job_flow:
step_nums = range(1, len(job_flow.steps) + 1)
else:
print 'You do not have access to that job flow.'
sys.exit(1)
cause = runner._find_probable_cause_of_failure(step_nums)
if cause:
# log cause, and put it in exception
cause_msg = [] # lines to log and put in exception
cause_msg.append('Probable cause of failure (from %s):' %
cause['log_file_uri'])
cause_msg.extend(line.strip('\n') for line in cause['lines'])
if cause['input_uri']:
cause_msg.append('(while reading from %s)' %
cause['input_uri'])
print '\n'.join(cause_msg)
else:
print 'No probable cause of failure found.'
if __name__ == '__main__':
main()
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