This topic describes how to collect Java Virtual Machine (JVM) runtime information.
Step 1: Log in to the ODC Docker container
# View the name of the ODC Docker container.
docker ps | grep odc
# Go to the ODC Docker container. Assume that the ODC Docker container name is odc.
docker exec -it odc sh
Step 2: Use the jps command to obtain the process number
Here is the sample command:
jps | grep odc
Here is the sample response:
67255 odc-web-starter-3.3.0-SNAPSHOT-executable.jar
62277 is the process number.
Step 3: Capture the thread dump
Use the following syntax:
jstack ${ODC_PID} > ${THREAD_DUMP_FILE_NAME}
Here is the sample command:
jstack 67255 > /home/admin/odcthreaddump.txt
Step 4: Capture the heap dump
Use the following syntax:
jmap -dump:live,format=b,file=${HEAP_DUMP_FILE_NAME} ${ODC_PID}
Here is the sample command:
jmap -dump:live,format=b,file=/home/admin/odcdump.hprof 67255
Step 5: Copy the dump file
/home/admin/odcthreaddump.txt obtained in step 3 and /home/admin/odcdump.hprof obtained in step 4 are the dump files.