Hello,
I have an application that uses H2 1.4.196 running in mixed mode.
Recently, I started the H2 Shell and instead of seeing the prompt like
normal, it just hangs.
The application uses the following url to connect
jdbc:h2:file:/var/packet-manager/data/database/packetmanager;MVCC=TRUE;AUTO_SERVER=TRUE;IFEXISTS=TRUE
After starting the application, the lock file packetmanager.lock.db contains
/var/packet-manager/data/database $ more packetmanager.lock.db
#FileLock
#Tue Nov 28 19:14:03 GMT 2023
server=172.20.0.2\:45062
hostName=19e5a52a4778
method=file
id=18c175a4d0dd653a64b0d292608b53c9345d636ec1c
Below is the output from the H2 Shell when executed in the same container
and with same user as the application. Trace level set to 3.
/usr/packet-manager/tools $ java -cp h2-1.4.196.jar org.h2.tools.Shell -url
"jdbc:h2:file:/var/packet-manager/data/database/packetmanager;MVCC=TRUE;AUTO_SERVER=TRUE;IFEXISTS=TRUE;TRACE_LEVEL_SYSTEM_OUT=3"
-user <username> -password <password>
2023-11-28 20:36:17 database: opening
/var/packet-manager/data/database/packetmanager (build 196)
2023-11-28 20:36:17 fileLock: load {server=172.20.0.2:45062,
hostName=19e5a52a4778, method=file,
id=18c175a4d0dd653a64b0d292608b53c9345d636ec1c}
You can see that the H2 Shell loads the existing lock file, the database is
open and a server was started on 172.20.0.2:45062. After that there is no
further output and it just hangs, so I took a thred dump.
"main" #1 prio=5 os_prio=0 cpu=256.68ms elapsed=4.09s
tid=0x00007f9d504ba800 nid=0x81 runnable [0x00007f9d50649000]
java.lang.Thread.State: RUNNABLE
at
java.net.SocketInputStream.socketRead0([email protected]/Native Method)
at
java.net.SocketInputStream.socketRead([email protected]/Unknown Source)
at java.net.SocketInputStream.read([email protected]/Unknown
Source)
at java.net.SocketInputStream.read([email protected]/Unknown
Source)
at java.io.BufferedInputStream.fill([email protected]/Unknown
Source)
at java.io.BufferedInputStream.read([email protected]/Unknown
Source)
- locked <0x00000000d2bf4098> (a java.io.BufferedInputStream)
at java.io.DataInputStream.readInt([email protected]/Unknown
Source)
at org.h2.value.Transfer.readInt(Transfer.java:153)
at org.h2.store.FileLock.checkServer(FileLock.java:247)
at org.h2.store.FileLock.lock(FileLock.java:129)
- locked <0x00000000d2b72798> (a org.h2.store.FileLock)
at org.h2.engine.Database.open(Database.java:662)
- locked <0x00000000d2c4ecc8> (a org.h2.engine.Database)
at org.h2.engine.Database.openDatabase(Database.java:276)
at org.h2.engine.Database.<init>(Database.java:270)
at org.h2.engine.Engine.openSession(Engine.java:64)
at org.h2.engine.Engine.openSession(Engine.java:176)
- locked <0x00000000d2d8da18> (a org.h2.engine.Engine)
at org.h2.engine.Engine.createSessionAndValidate(Engine.java:154)
at org.h2.engine.Engine.createSession(Engine.java:137)
at org.h2.engine.Engine.createSession(Engine.java:27)
at
org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.java:354)
at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:116)
at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:100)
at org.h2.Driver.connect(Driver.java:69)
at java.sql.DriverManager.getConnection([email protected]/Unknown
Source)
at java.sql.DriverManager.getConnection([email protected]/Unknown
Source)
at org.h2.tools.Shell.runTool(Shell.java:148)
at org.h2.tools.Shell.main(Shell.java:81)
It looks like the H2 Shell is waiting on a response from the server as
initiated by FileLock.checkServer, but never receives one?
Some details about the application
Environment: docker container using Bellsoft Liberica Java 11 image (Alpine
Linux base image) (bellsoft/liberica-openjre-alpine-musl:11.0.20.1-1-x86_64)
Docker Engine version: 19.03.2 Community
Springboot version: 2.5.5
H2 version: 1.4.196
And some notes
- If I stop the application and execute the H2 Shell I'm able to connect
without issue.
- I have a few more applications using H2 with the exact same setup. I'm
able to connect via the H2 Shell without issue on those.
I've looked through both Stack Overflow and Groups with various keywords
with no luck.
Does anyone have any suggestions on how to solve this issue?
Thanks,
Scott
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