logagent-js: Logagent stops receiving log lines when monitored container restarts

My logagents repeatedly stop receiving log lines from containers after running for a couple of hours. It seems to be linked to when the monitored containers restart.

Here’s my docker-compose config:

logagent:
  image: sematext/logagent:latest
  environment:
    - LOGS_RECEIVER_URL=https://logsene-receiver.eu.sematext.com
    - LOGSENE_ENABLED_DEFAULT=false
    - LOGSENE_TOKEN=${LOGS_TOKEN_DEFAULT}
    - LOGAGENT_ARGS=--verbose
  restart: always
  volumes:
    - /var/run/docker.sock:/var/run/docker.sock

And my monitored containers have the following env vars:

environment:
  - LOGSENE_ENABLED=true
  - LOGSENE_TOKEN=${LOGS_TOKEN_WORKER}

Here is the log output. Everything is fine (X lines parsed) until the monitored container restarts, after which everything is 0…

2019-05-21T11:05:41.883Z pid[6] Memory stats:  heapUsedMB=18 heapTotalMB=24 memoryRssMB=114
2019-05-21T11:06:41.882Z pid[6] Logagent report: pid[6] 59999 ms 59 lines parsed.  1 lines/s 0.000 MB/s - empty lines: 0
2019-05-21T11:06:41.882Z pid[6] Logagent stats: usedTokens=1 shippedLogs=61 httpFailed=0 httpRetransmit=0 throughputLinesPerSecond=1
2019-05-21T11:06:41.882Z pid[6] Memory stats:  heapUsedMB=18 heapTotalMB=24 memoryRssMB=114
2019-05-21T11:07:41.882Z pid[6] Logagent report: pid[6] 60001 ms 40 lines parsed.  1 lines/s 0.000 MB/s - empty lines: 0
2019-05-21T11:07:41.883Z pid[6] Logagent stats: usedTokens=1 shippedLogs=37 httpFailed=0 httpRetransmit=0 throughputLinesPerSecond=1
2019-05-21T11:07:41.883Z pid[6] Memory stats:  heapUsedMB=18 heapTotalMB=24 memoryRssMB=114
2019-05-21T11:08:41.883Z pid[6] Logagent report: pid[6] 60001 ms 55 lines parsed.  1 lines/s 0.000 MB/s - empty lines: 0
2019-05-21T11:08:41.884Z pid[6] Logagent stats: usedTokens=1 shippedLogs=59 httpFailed=0 httpRetransmit=0 throughputLinesPerSecond=1
2019-05-21T11:08:41.884Z pid[6] Memory stats:  heapUsedMB=16 heapTotalMB=24 memoryRssMB=114
2019-05-21T11:09:41.883Z pid[6] Logagent report: pid[6] 60000 ms 52 lines parsed.  1 lines/s 0.000 MB/s - empty lines: 0
2019-05-21T11:09:41.884Z pid[6] Logagent stats: usedTokens=1 shippedLogs=52 httpFailed=0 httpRetransmit=0 throughputLinesPerSecond=1
2019-05-21T11:09:41.884Z pid[6] Memory stats:  heapUsedMB=16 heapTotalMB=24 memoryRssMB=114
2019-05-21T11:10:41.883Z pid[6] Logagent report: pid[6] 60000 ms 42 lines parsed.  1 lines/s 0.000 MB/s - empty lines: 0
2019-05-21T11:10:41.884Z pid[6] Logagent stats: usedTokens=1 shippedLogs=35 httpFailed=0 httpRetransmit=0 throughputLinesPerSecond=1
2019-05-21T11:10:41.884Z pid[6] Memory stats:  heapUsedMB=17 heapTotalMB=24 memoryRssMB=114
2019-05-21T11:11:41.882Z pid[6] Logagent report: pid[6] 59999 ms 60 lines parsed.  1 lines/s 0.000 MB/s - empty lines: 0
2019-05-21T11:11:41.883Z pid[6] Logagent stats: usedTokens=1 shippedLogs=62 httpFailed=0 httpRetransmit=0 throughputLinesPerSecond=1
2019-05-21T11:11:41.884Z pid[6] Memory stats:  heapUsedMB=17 heapTotalMB=25 memoryRssMB=114
2019-05-21T11:12:41.883Z pid[6] Logagent report: pid[6] 60001 ms 16 lines parsed.  0 lines/s 0.000 MB/s - empty lines: 0
2019-05-21T11:12:41.884Z pid[6] Logagent stats: usedTokens=1 shippedLogs=16 httpFailed=0 httpRetransmit=0 throughputLinesPerSecond=0
2019-05-21T11:12:41.884Z pid[6] Memory stats:  heapUsedMB=17 heapTotalMB=25 memoryRssMB=113
2019-05-21T11:13:09.591Z pid[6] Container a24e888d660df941da452037242f507ebaddcd4cdc5aa8f5b87abed71dc3f33d /my_worker_4 setting LOGSENE_ENABLED=true
2019-05-21T11:13:41.884Z pid[6] Logagent report: pid[6] 60001 ms 5 lines parsed.  0 lines/s 0.000 MB/s - empty lines: 0
2019-05-21T11:13:41.885Z pid[6] Logagent stats: usedTokens=1 shippedLogs=14 httpFailed=0 httpRetransmit=0 throughputLinesPerSecond=0
2019-05-21T11:13:41.885Z pid[6] Memory stats:  heapUsedMB=17 heapTotalMB=25 memoryRssMB=113
2019-05-21T11:14:41.884Z pid[6] Logagent report: pid[6] 60000 ms 0 lines parsed.  0 lines/s 0.000 MB/s - empty lines: 0
2019-05-21T11:14:41.885Z pid[6] Logagent stats: usedTokens=1 shippedLogs=0 httpFailed=0 httpRetransmit=0 throughputLinesPerSecond=0
2019-05-21T11:14:41.885Z pid[6] Memory stats:  heapUsedMB=17 heapTotalMB=25 memoryRssMB=114
2019-05-21T11:15:41.885Z pid[6] Logagent report: pid[6] 60000 ms 0 lines parsed.  0 lines/s 0.000 MB/s - empty lines: 0
2019-05-21T11:15:41.885Z pid[6] Logagent stats: usedTokens=1 shippedLogs=0 httpFailed=0 httpRetransmit=0 throughputLinesPerSecond=0
2019-05-21T11:15:41.885Z pid[6] Memory stats:  heapUsedMB=17 heapTotalMB=25 memoryRssMB=114
2019-05-21T11:16:41.885Z pid[6] Logagent report: pid[6] 60001 ms 0 lines parsed.  0 lines/s 0.000 MB/s - empty lines: 0
2019-05-21T11:16:41.886Z pid[6] Logagent stats: usedTokens=1 shippedLogs=0 httpFailed=0 httpRetransmit=0 throughputLinesPerSecond=0
2019-05-21T11:16:41.886Z pid[6] Memory stats:  heapUsedMB=17 heapTotalMB=25 memoryRssMB=114
2019-05-21T11:17:41.885Z pid[6] Logagent report: pid[6] 60000 ms 0 lines parsed.  0 lines/s 0.000 MB/s - empty lines: 0
2019-05-21T11:17:41.886Z pid[6] Logagent stats: usedTokens=1 shippedLogs=0 httpFailed=0 httpRetransmit=0 throughputLinesPerSecond=0