https://issues.apache.org/bugzilla/show_bug.cgi?id=55233
Bug ID: 55233
Summary: [websocket] Problem reading many subsequent binary
messages
Product: Tomcat 8
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: major
Priority: P2
Component: Catalina
Assignee: [email protected]
Reporter: [email protected]
I have a test client that receives many binary messages. The server sends
thousands of binary messages with size 1024 with no delay between them. At some
point of time, the client fails to read the message and the connection is
closed. See some close reasons below.
I am wondering whether there is some issue with the read buffers being modified
from other threads.
Seeing all close reasons below, there are two issues here:
- why there is buffer overflow when there is plenty of space to store the
incoming data (e.g. "unwrapping [1,130] bytes into a [8,192]")
- why there are attempts to unwrap bigger buffer into smaller one. I thought
this should not be possible (e.g. "unwrapping [12,466] bytes into a [8,192]")
Here are some close reasons occurred during the test:
Ending test thread as websocket session is closed
Connection closed: Buffer overflow unwrapping [6,466] bytes into a [8,192] byte
buffer that already contained [0] bytes.
Ending test thread as websocket session is closed
Connection closed: Buffer overflow unwrapping [1,130] bytes into a [8,192] byte
buffer that already contained [0] bytes.
Ending test thread as websocket session is closed
Connection closed: Buffer overflow unwrapping [2,240] bytes into a [8,192] byte
buffer that already contained [0] bytes.
Ending test thread as websocket session is closed
Connection closed: Buffer overflow unwrapping [12,466] bytes into a [8,192]
byte buffer that already contained [0] bytes.
Ending test thread as websocket session is closed
Connection closed: Buffer overflow unwrapping [2,071] bytes into a [8,192] byte
buffer that already contained [0] bytes.
Ending test thread as websocket session is closed
Connection closed: Buffer overflow unwrapping [12,466] bytes into a [8,192]
byte buffer that already contained [0] bytes.
Ending test thread as websocket session is closed
Connection closed: Buffer overflow unwrapping [4,356] bytes into a [8,192] byte
buffer that already contained [0] bytes.
Ending test thread as websocket session is closed
Connection closed: Buffer overflow unwrapping [14,059] bytes into a [8,192]
byte buffer that already contained [0] bytes.
Ending test thread as websocket session is closed
Connection closed: Buffer overflow unwrapping [4,707] bytes into a [8,192] byte
buffer that already contained [0] bytes.
Ending test thread as websocket session is closed
Connection closed: Buffer overflow unwrapping [10,041] bytes into a [8,192]
byte buffer that already contained [0] bytes.
Ending test thread as websocket session is closed
Connection closed: Buffer overflow unwrapping [2,478] bytes into a [8,192] byte
buffer that already contained [0] bytes.
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