-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Alex,
On 8/11/20 11:47, Alex Maltinsky wrote: > Hi Folks > > We ran into what looks like a memory leak in tomcat 8.5.57 on > Ubuntu 18.04 running on Openjdk 11.0.5 > > Our app maintains permanent websocket connections with multiple > clients (also written in Java, using the Tyrus websocket client - > version 1.13.1). Recently, a few clients began misbehaving. They're > opening multiple websocket sessions in parallel which our app > doesn't allow. When this happens, the app closes the previous > websocket session and starts talking to the client over the new one > session exclusively. This issue happened to two of our clients that > have a bunch of network connectivity issues which somehow triggered > this behavior. However, I'm not here to debug the misbehaving > clients, the client issue is being investigated in parallel. > However, it appears that this behavior triggered a memory leak in > tomcat. Slowly but surely our heap keeps filling up with byte > arrays that seem to have come from the misbehaving clients (we know > this from the contents of the arrays). Below are the paths to the > gc roots for a few of these arrays that contain data from one such > client. The heap dump was taken *over an hour after the client was > blocked by its IP address using iptables*. So we believe there's no > reason for these buffers to still exist in memory. Please note that > the path to the GC roots are all inside tomcat, our app is nowhere > to be found. > > We would appreciate any guidance or suggestions. > > Thanks! > > image.png > > image.png > > image.png Your image attachments have been removed. Can you post them elsewhere + links in your message, or transcribe them into text? Alternatively, do you have a simple test case that reproduces the proble m? - -chris -----BEGIN PGP SIGNATURE----- Comment: Using GnuPG with Thunderbird - https://www.enigmail.net/ iQIzBAEBCAAdFiEEMmKgYcQvxMe7tcJcHPApP6U8pFgFAl8y04IACgkQHPApP6U8 pFhoSBAAjLc+roLwg8Qj7HVaHXGWOyucUqAsQOa7jMucQTQkMfs3PiuIfkMxvRp0 SdRU0uK81E3gIjkwtjeACyeqZIxjExI2RIIe/A4kwtqcZmHkvE/wgayaWM4ncLlI tIrppKyEOb3G5aRwoRlaJ4TZxcm7EnvDKVLC8XTPZeQUtoKBS7zeVQFUZiW72gkM UU2RllLITeFsjTZGZfQ6I++XHOgrOMKhvswkxRl0zwSzBZM4Sg44xBUKQPj6b8iQ d3t6Z9Cy2ynTP1idI1reqEXHeajHLcrlG3VwDwOzQhhgN0TXL+5HEzomAFin9eaI D59tPPEClBmP1+1C3/Bse8XYOTUdDIzA7EoSEgXsaaQbkMmapUx6XUH1l0CGlzhI oMUvzkvmMuM4k/MLkD7elsG3YTORLK+ouuwd5gDd6o3xfSy3FXgsAbYxpRMQ/vcs zkuJ9trREe9uKCsb/MCtLx4cms3ndTo/Q44cEmpdHVMCeQNKnBeQzn9icEzJU7ib cF6fIHoI6ifLw9v1nzO1Lr/v3LiDm2WoptUZSLOcB0+dhaz+gLCId9gz6A0yw2DQ VzufR5whkZezS/6Rm40J6r8jLItrXfUALm6eDmulfGDUU6Y9JjQe/oUDdQYArKTE lVU7JBCc/4wVrZL6DsfnqDecfprRI01wTjXSJ8IP9s6xega2Czc= =R1Cn -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
