2018-08-20 16:40:49,939 ERROR [activiti.engine.impl.db.DbSqlSession] - problem during schema create, statement alter table ACT_RE_PROCDEF
add constraint ACT_UNIQ_PROCDEF
unique (KEY_,VERSION_, TENANT_ID_)
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Specified key was too long; max key length is 1000 bytes
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:409)
at com.mysql.jdbc.Util.getInstance(Util.java:384)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1052)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4232)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4164)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2615)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2776)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2832)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2781)
at com.mysql.jdbc.StatementImpl.execute(StatementImpl.java:908)
at com.mysql.jdbc.StatementImpl.execute(StatementImpl.java:788)
at com.alibaba.druid.filter.FilterChainImpl.statement_execute(FilterChainImpl.java:2489)
at com.alibaba.druid.filter.FilterAdapter.statement_execute(FilterAdapter.java:2451)
at com.alibaba.druid.filter.FilterEventAdapter.statement_execute(FilterEventAdapter.java:188)
at com.alibaba.druid.filter.FilterChainImpl.statement_execute(FilterChainImpl.java:2487)
at com.alibaba.druid.proxy.jdbc.StatementProxyImpl.execute(StatementProxyImpl.java:137)
at com.alibaba.druid.pool.DruidPooledStatement.execute(DruidPooledStatement.java:421)
at org.activiti.engine.impl.db.DbSqlSession.executeSchemaResource(DbSqlSession.java:1368)
at org.activiti.engine.impl.db.DbSqlSession.executeSchemaResource(DbSqlSession.java:1288)