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KEYCLOAK-17870 Fix ConcurrentModificationException upon liquibase initialization

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Hynek Mlnarik 2021-04-26 10:43:57 +02:00 committed by Hynek Mlnařík
parent df4f88a0c8
commit 3e91e6f966
1 changed files with 9 additions and 5 deletions
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14
model/jpa/src/main/java/org/keycloak/connections/jpa/updater/liquibase/conn/DefaultLiquibaseConnectionProvider.java
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@ -48,6 +48,7 @@ import org.keycloak.models.KeycloakSession;
import org.keycloak.models.KeycloakSessionFactory;
import java.sql.Connection;
import java.util.concurrent.atomic.AtomicBoolean;
import liquibase.changelog.ChangeLogHistoryServiceFactory;
/**
@ -61,15 +62,18 @@ public class DefaultLiquibaseConnectionProvider implements LiquibaseConnectionPr
private int indexCreationThreshold;
private volatile boolean initialized = false;
private static final AtomicBoolean INITIALIZATION = new AtomicBoolean(false);
@Override
public LiquibaseConnectionProvider create(KeycloakSession session) {
if (!initialized) {
synchronized (this) {
if (!initialized) {
if (! INITIALIZATION.get()) {
// We need critical section synchronized on some static final field, otherwise
// e.g. several Undertows or parallel model tests could attempt initializing Liquibase
// in the same JVM at the same time which leads to concurrency failures
synchronized (INITIALIZATION) {
if (! INITIALIZATION.get()) {
baseLiquibaseInitialization();
initialized = true;
INITIALIZATION.set(true);
}
}
}