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ThreadRecorder + DeadLock 検知を試してみる
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| sudo dnf install -y --enablerepo="*debug*" hg net-snmp net-snmp-devel gcc gcc-c++ binutils binutils-devel maven ant java-1.8.0-openjdk java-1.8.0-openjdk-devel java-1.8.0-openjdk-debuginfo | |
| hg clone http://icedtea.classpath.org/hg/heapstats | |
| cd heapstats/ | |
| ./configure; make agent | |
| sed -e "s/thread_record_enable=false/thread_record_enable=true/" agent/heapstats.conf > agent/heapstats_threadrecorder.conf | |
| cd agent/test/deadlock | |
| javac DLSample.java | |
| java -agentpath:../../src/libheapstats.so=../../heapstats_threadrecorder.conf DLSample 5 |
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| % java -agentpath:../../src/libheapstats.so=../../heapstats_threadrecorder.conf DLSample 5 | |
| heapstats INFO: heapstats_agent 1.1.1 | |
| heapstats INFO: Supported processor features: AVX | |
| heapstats WARN: Could not find sun.misc.IoTrace class. | |
| heapstats WARN: Turn off I/O recording. | |
| heapstats INFO: Agent Attach Enable = true | |
| heapstats INFO: SnapShot FileName = heapstats_snapshot.dat | |
| heapstats INFO: Heap Log FileName = heapstats_log.csv | |
| heapstats INFO: Archive FileName = heapstats_analyze.zip | |
| heapstats INFO: Console Log FileName = None (output to console) | |
| heapstats INFO: LogLevel = INFO | |
| heapstats INFO: ReduceSnapShot = true | |
| heapstats INFO: CollectRefTree = true | |
| heapstats INFO: Trigger on FullGC = true | |
| heapstats INFO: Trigger on DumpRequest = true | |
| heapstats INFO: Deadlock check = true | |
| heapstats INFO: Log trigger on Error = true | |
| heapstats INFO: Log trigger on Signal = true | |
| heapstats INFO: Log trigger on Deadlock = true | |
| heapstats INFO: RankingOrder = delta | |
| heapstats INFO: RankLevel = 5 | |
| heapstats INFO: AlertPercentage = 50 ( 458752000 bytes ) | |
| heapstats INFO: Java heap usage alert percentage = 95 ( 831 MB ) | |
| heapstats INFO: Metaspace usage alert threshold 0 MB | |
| heapstats INFO: SnapShot interval = 0 sec | |
| heapstats INFO: Log interval = 300 sec | |
| heapstats INFO: First collect log = true | |
| heapstats INFO: Signal for normal logging is DISABLED. | |
| heapstats INFO: Signal for all logging = SIGUSR2 | |
| heapstats INFO: Signal for config reloading = SIGHUP | |
| heapstats INFO: Thread recorder = true | |
| heapstats INFO: Buffer size of thread recorder = 100 MB | |
| heapstats INFO: Thread record file name = heapstats-thread-records.htr | |
| heapstats INFO: Thread record I/O tracer = /usr/local/etc/iotracer/IoTrace.class | |
| heapstats INFO: Send SNMP Trap = true | |
| heapstats INFO: SNMP target = localhost | |
| heapstats INFO: SNMP community = public | |
| heapstats INFO: Temporary log directory = ./tmp | |
| heapstats INFO: Archive command = "/usr/bin/zip %archivefile% -jr %logdir%" | |
| heapstats INFO: Kill on Error = false | |
| heapstats CRIT: ALERT(DEADLOCK): occurred deadlock. threadCount: 5, threadName: "Thread-2" | |
| heapstats WARN: thread name: Thread-3, prio: 5 | |
| heapstats WARN: thread name: Thread-4, prio: 5 | |
| heapstats WARN: thread name: Thread-0, prio: 5 | |
| heapstats WARN: thread name: Thread-1, prio: 5 | |
| heapstats WARN: thread name: Thread-2, prio: 5 | |
| heapstats WARN: Couldn't open copy source file. cause: 許可がありません | |
| heapstats WARN: Could not copy /var/log/messages cause: 許可がありません | |
| heapstats WARN: Could not copy file: /proc/self/fd/1 cause: 無効な引数です | |
| heapstats WARN: Could not copy file: /proc/self/fd/2 cause: 無効な引数です | |
| adding: journalctl_-q_--all_--this-boot_--no-pager_-o_verbose.log (deflated 92%) | |
| adding: envInfo.txt (deflated 68%) | |
| adding: udp6 (deflated 63%) | |
| adding: tcp6 (deflated 68%) | |
| adding: sockowner (stored 0%) | |
| adding: redhat-release (stored 0%) | |
| adding: threaddump.txt (deflated 83%) | |
| adding: status (deflated 63%) | |
| adding: smaps (deflated 96%) | |
| adding: tcp (deflated 59%) | |
| adding: udp (deflated 61%) | |
| adding: cmdline (deflated 12%) | |
| adding: limits (deflated 78%) | |
| heapstats INFO: Collecting log has been completed: /home/ykubota/tmp/heapstats/heapstats/agent/test/deadlock/heapstats_analyze151017213801.zip | |
| heapstats INFO: Elapsed Time (in Take LogInfo): 0.110000 sec (user = 0.000000, sys = 0.010000) |
ThreadRecorder の情報は heapstats-thread-records.htr .
ちょっと古いが下の HeapStatsFXAnalyzer の Thread Recorder パネルから読み込んで確認することができる。
https://github.com/ykubota/HeapStatsFXAnalyzer/releases/download/test/heapstats-analyzer-2.0-bin.zip
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heapstats CRIT: ALERT(DEADLOCK): occurred deadlock. threadCount: 5, threadName: "Thread-2"の部分でデッドロック検知して詳細ログを取っている。root 権限じゃないので一部情報が取れてない(/var/log/messagesとか)