使用SonarQube 5.2我发现以下死锁问题：
05:48:22 ERROR: Error during Sonar runner execution
05:48:22 java.lang.IllegalStateException: Fail to execute request
[code=500, url=http://192.168.109.6/api/ce/submit?projectKey=CoprHD&projectName=CoprHD-controller&projectBranch=bugfix-COP-19001-hotfix]:
{"errors":[{"msg":"\n### Error updating database.
Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLTransactionRollbackException:
Deadlock found when trying to get lock; try restarting transaction\n
### The error may involve org.sonar.db.user.RoleMapper.insertGroupRole-Inline\n### The error occurred while setting parameters\n
### SQL: INSERT INTO group_roles (group_id, resource_id, role) VALUES (?, ?, ?)\n
### Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLTransactionRollbackException: Deadlock found when trying to get lock; try restarting transaction"}]}
05:48:22 at org.sonar.batch.report.ReportPublisher.uploadMultiPartReport(ReportPublisher.java:182)
05:48:22 at org.sonar.batch.report.ReportPublisher.sendOrDumpReport(ReportPublisher.java:151)
05:48:22 at org.sonar.batch.report.ReportPublisher.execute(ReportPublisher.java:115)
05:48:22 at org.sonar.batch.phases.PhaseExecutor.publishReportJob(PhaseExecutor.java:116)
05:48:22 at org.sonar.batch.phases.PhaseExecutor.execute(PhaseExecutor.java:106)
05:48:22 at org.sonar.batch.scan.ModuleScanContainer.doAfterStart(ModuleScanContainer.java:192)
05:48:22 at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:100)
05:48:22 at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:85)
05:48:22 at org.sonar.batch.scan.ProjectScanContainer.scan(ProjectScanContainer.java:258)
05:48:22 at org.sonar.batch.scan.ProjectScanContainer.scanRecursively(ProjectScanContainer.java:253)
05:48:22 at org.sonar.batch.scan.ProjectScanContainer.doAfterStart(ProjectScanContainer.java:243)
05:48:22 at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:100)
05:48:22 at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:85)
05:48:22 at org.sonar.batch.bootstrap.GlobalContainer.executeAnalysis(GlobalContainer.java:153)
05:48:22 at org.sonar.batch.bootstrapper.Batch.executeTask(Batch.java:110)
05:48:22 at org.sonar.runner.batch.BatchIsolatedLauncher.execute(BatchIsolatedLauncher.java:55)
05:48:22 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
05:48:22 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
05:48:22 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
05:48:22 at java.lang.reflect.Method.invoke(Method.java:606)
05:48:22 at org.sonar.runner.impl.IsolatedLauncherProxy.invoke(IsolatedLauncherProxy.java:61)
05:48:22 at com.sun.proxy.$Proxy0.execute(Unknown Source)
05:48:22 at org.sonar.runner.api.EmbeddedRunner.doExecute(EmbeddedRunner.java:275)
05:48:22 at org.sonar.runner.api.EmbeddedRunner.runAnalysis(EmbeddedRunner.java:166)
05:48:22 at org.sonar.runner.api.EmbeddedRunner.runAnalysis(EmbeddedRunner.java:153)
05:48:22 at org.sonar.runner.cli.Main.runAnalysis(Main.java:118)
05:48:22 at org.sonar.runner.cli.Main.execute(Main.java:80)
05:48:22 at org.sonar.runner.cli.Main.main(Main.java:66)
搜索类似的报告时，我发现此参考文献说明问题已得到解决：https://jira.sonarsource.com/browse/SONAR-1945
我还发现了一个引用，即事务隔离应该从REPEATABLE-READ更改为READ-COMMITTED。这对于Sonar的mysql来说是否合理？
mysql> show variables like '%wait_timeout%';
+--------------------------+----------+
| Variable_name | Value |
+--------------------------+----------+
| innodb_lock_wait_timeout | 500 |
| lock_wait_timeout | 31536000 |
| wait_timeout | 28800 |
+--------------------------+----------+
3 rows in set (0.25 sec)
mysql> show variables like '%tx_isolation%';
+---------------+-----------------+
| Variable_name | Value |
+---------------+-----------------+
| tx_isolation | REPEATABLE-READ |
+---------------+-----------------+
1 row in set (0.00 sec)
mysql> SELECT @@GLOBAL.tx_isolation, @@tx_isolation;
+-----------------------+-----------------+
| @@GLOBAL.tx_isolation | @@tx_isolation |
+-----------------------+-----------------+
| REPEATABLE-READ | REPEATABLE-READ |
+-----------------------+-----------------+
有关死锁问题的更多信息，这里有一些数据。
有没有人知道这个问题是否应该在mysql中进行调整，或者这是一个需要在SonarQube应用程序中修复的问题？
mysql> show engine innodb status
=====================================
2015-12-18 07:42:25 7f61f03cd700 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 31 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 44635 srv_active, 0 srv_shutdown, 1284536 srv_idle
srv_master_thread log flush and writes: 1329157
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 224853
OS WAIT ARRAY INFO: signal count 1727534
Mutex spin waits 1578113, rounds 7231747, OS waits 74673
RW-shared spins 483413, rounds 5257332, OS waits 110301
RW-excl spins 197945, rounds 3737144, OS waits 35005
Spin rounds per wait: 4.58 mutex, 10.88 RW-shared, 18.88 RW-excl
------------------------
LATEST DETECTED DEADLOCK
------------------------
2015-12-17 05:46:47 7f61f0594700
*** (1) TRANSACTION:
TRANSACTION 17641507, ACTIVE 0 sec inserting
mysql tables in use 1, locked 1
LOCK WAIT 8 lock struct(s), heap size 1184, 7 row lock(s), undo log entries 9
MySQL thread id 5021, OS thread handle 0x7f61f071a700, query id 33269201 localhost 127.0.0.1 sonar update
INSERT INTO group_roles (group_id, resource_id, role)
VALUES (null, 1515106, 'codeviewer')
*** (1) WAITING FOR THIS LOCK TO BE GRANTED:
RECORD LOCKS space id 310 page no 6 n bits 472 index `group_roles_resource` of table `sonar`.`group_roles` trx id 17641507 lock_mode X insert intention waiting
Record lock, heap no 1 PHYSICAL RECORD: n_fields 1; compact format; info bits 0
0: len 8; hex 73757072656d756d; asc supremum;;
*** (2) TRANSACTION:
TRANSACTION 17641509, ACTIVE 0 sec inserting
mysql tables in use 1, locked 1
7 lock struct(s), heap size 1184, 4 row lock(s), undo log entries 3
MySQL thread id 5005, OS thread handle 0x7f61f0594700, query id 33269204 localhost 127.0.0.1 sonar update
INSERT INTO group_roles (group_id, resource_id, role)
VALUES (1, 1515107, 'admin')
*** (2) HOLDS THE LOCK(S):
RECORD LOCKS space id 310 page no 6 n bits 472 index `group_roles_resource` of table `sonar`.`group_roles` trx id 17641509 lock_mode X
Record lock, heap no 1 PHYSICAL RECORD: n_fields 1; compact format; info bits 0
0: len 8; hex 73757072656d756d; asc supremum;;
*** (2) WAITING FOR THIS LOCK TO BE GRANTED:
RECORD LOCKS space id 310 page no 6 n bits 472 index `group_roles_resource` of table `sonar`.`group_roles` trx id 17641509 lock_mode X insert intention waiting
Record lock, heap no 1 PHYSICAL RECORD: n_fields 1; compact format; info bits 0
0: len 8; hex 73757072656d756d; asc supremum;;
*** WE ROLL BACK TRANSACTION (2)
------------
TRANSACTIONS
------------
Trx id counter 18864174
Purge done for trx's n:o
<pre>
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 0, not started
MySQL thread id 7482, OS thread handle 0x7f61f03cd700, query id 38116433 localhost sonar init
show engine innodb status
---TRANSACTION 18864038, not started
MySQL thread id 7478, OS thread handle 0x7f61f3349700, query id 38115903 localhost 127.0.0.1 sonar cleaning up
---TRANSACTION 18864173, not started
MySQL thread id 7475, OS thread handle 0x7f61f040e700, query id 38116432 localhost 127.0.0.1 sonar cleaning up
--------
FILE I/O
--------
I/O thread 0 state: waiting for completed aio requests (insert buffer thread)
I/O thread 1 state: waiting for completed aio requests (log thread)
I/O thread 2 state: waiting for completed aio requests (read thread)
I/O thread 3 state: waiting for completed aio requests (read thread)
I/O thread 4 state: waiting for completed aio requests (read thread)
I/O thread 5 state: waiting for completed aio requests (read thread)
I/O thread 6 state: waiting for completed aio requests (write thread)
I/O thread 7 state: waiting for completed aio requests (write thread)
I/O thread 8 state: waiting for completed aio requests (write thread)
I/O thread 9 state: waiting for completed aio requests (write thread)
Pending normal aio reads: 0 [0, 0, 0, 0] , aio writes: 0 [0, 0, 0, 0] ,
ibuf aio reads: 0, log i/o's: 0, sync i/o's: 0
Pending flushes (fsync) log: 0; buffer pool: 0
7146308 OS file reads, 6478063 OS file writes, 1783568 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 0.00 writes/s, 0.00 fsyncs/s
-------------------------------------
INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
Ibuf: size 1, free list len 3077, seg size 3079, 22965 merges
merged operations:
insert 45672, delete mark 7198683, delete 214896
discarded operations:
insert 0, delete mark 0, delete 0
Hash table size 6374777, node heap has 11107 buffer(s)
0.00 hash searches/s, 0.00 non-hash searches/s
---
LOG
---
Log sequence number 219765124434
Log flushed up to 219765124434
Pages flushed up to 219765124434
Last checkpoint at 219765124434
0 pending log writes, 0 pending chkp writes
1189792 log i/o's done, 0.00 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total memory allocated 3296722944; in additional pool allocated 0
Dictionary memory allocated 359878
Buffer pool size 196600
Free buffers 8192
Database pages 177301
Old database pages 65285
Modified db pages 0
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 1567756, not young 296705943
0.00 youngs/s, 0.00 non-youngs/s
Pages read 7146255, created 1592527, written 5004155
0.00 reads/s, 0.00 creates/s, 0.00 writes/s
Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 0 / 1000
Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s
LRU len: 177301, unzip_LRU len: 0
I/O sum[0]:cur[0], unzip sum[0]:cur[0]